Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7607f0fcd8ba0dc…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 05:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ad46d5eae7aabf6e7370296e320df5b SHA-1: f4689910ade5a7b3531a4dfaf129556483e32c9f SHA-256: f7607f0fcd8ba0dcd3db331811a350f81d9730099fb5615cb8103fb2a631f8dd
236 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, potentially leading to further malicious content, and specifically lures the user into executing commands via the clipboard. This social engineering tactic, combined with the PDF's structure, suggests an attempt to bypass security measures and execute arbitrary commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pillshop.ru/uimg/files/jorepegefivezi.pdf In PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469e62c03ae---2377587609.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/dutuzazefetorarixifuzixap.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/32696805387.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/67676818390.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/7914780450.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/ragigasepav.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/suxatoduxoduza.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/gebekopabikasosalosed.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bbfd974bb---loxalanadivolar.pdfIn PDF document text
    • https://tepihtrava.rs/files/2533759232.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/53052840307.pdfIn PDF document text
    • http://electric-kernbichler.at/suditaborom.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161446820d9548---tofiziwaxazezori.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d28d64eb8---92907069916.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/41133048432.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/67142962105.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/disitedanumerad.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382693d69c1---18907566950.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614333574f8c3---27574977873.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/kobotak.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16135ea166b0bd---febudurofalojedapozufi.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/fumefupure.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hpigv6dr873ig1jb80ip3q4r72/99840709130.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-19/20210919060703445030.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/98188517938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=fingerprint+lock+screen+wallpaper+hd+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8F 17960 bytes
SHA-256: 77637d49acca860893cb7e6eb40ce69f209d65180719b2a70fcbee34d85e7edf
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12610 10948 bytes
SHA-256: 8e18215c7e9e02421732596164c2d6daf1af5b70763cd22ab92be5dea113b43e