Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d1efd3909359ed…

MALICIOUS

PDF

101.8 KB Created: 2021-06-27 11:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5295f02ed715a1088e0474006c0906a1 SHA-1: f807fa685399d1b6d10d3d38e6a33de3a849bc13 SHA-256: 46d1efd3909359ed9b3ca1c99f3a26733c3ffb41f7b63bb8bddfcefacd6197a5
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a social engineering attack, specifically a ClickFix lure, by instructing the user to execute commands via Win+R or a terminal. The document also contains numerous links to potentially compromised websites and upload directories, suggesting it may serve as a dropper or part of a link farm for further malicious activity. The presence of ClamAV detection and ML flagging further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://alhouti.com/userfiles/file/xegop.pdf In PDF document text
    • https://copab.tn/216mag.svn/uploads/files/24476233290.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac207442fd1---ragelefubopuvewawabalaxuf.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6c736f732524975c602edd59a5f74f04/bipamenax.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079115319835---jasexaw.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210515181250.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/92498464486.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/09a461e6e09693957c496cc8039b4408/34705182207.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c6b861613---8152789995.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160826386dcf56---zewaredikopetesog.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/e758eca7222d5d26874525db9bf74764/vapolikenifanisineja.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5923a16c27---luwakedu.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075db1db774c---wazuketivadupaw.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ab2784d1---mapemewokozutes.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/luteparumejimidonizuf.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7273a82c6---wizuxubaxeruvupubisow.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/burugepurudemamivowofudo.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/69546396130.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ac95ca9c2ecfd21664495033ac6b0e0e/dinemigofopuwazalenime.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/2e088c456c9885edab5117732f6418e7/banaverowuxevufo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29124520df---15873582812.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d67b6393---xofexujuzu.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3df1287be2---55850280564.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd804e6360a---xarezonutufix.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/vidorow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=list+all+the+shortcut+keys+in+computerPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 20252 bytes
SHA-256: a984c46bb77ab6be9c1fdfe368d2cb570c09f2ed8083c2dc8d9407636b703833
font_02_sfnt_off00015a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5B 10900 bytes
SHA-256: 150299fe19765bffe4d3504874f24f4a14389a0bcc839739ead9c3f4a7ae92b5
font_03_sfnt_off00017371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17371 16228 bytes
SHA-256: 7813d04a334d78a161557fb64f946c1c0e11b81cd971c07827196de344907038

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