Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f197c9d90f6e85…

MALICIOUS

PDF

123.8 KB Created: 2021-06-29 03:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 207a6173ff7c08ff88501311890ef43c SHA-1: e3fc921d17ee571076d8e0c13326134e34b4d66a SHA-256: c2f197c9d90f6e85f3916f4540e77563fd1b1879227b0a36589ff00ab0981b6b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links to compromised WordPress sites, indicating it's designed to host malicious content. The 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste commands, likely to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9161

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/5cc68f4e33e7244c209a2496335d0bae/58885274876.pdf In PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/760f2c0165c07bd723503e1b028c54e4/natedebodupovutuz.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/34179036047.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/7267818012.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/90942031857.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/14567317971.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/21351737289.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab305cc74d3---46277161100.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/21495593360.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/65286774736.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a85df286c24---81096472282.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f002782e96---26029439426.pdfIn PDF document text
    • http://centrons.com/uploaded/file/170505378660bb36e565ab7.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/k5pifa95di3gh3r8mnn2l5jmb1/sifegasanonu.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/05a79e3dc52a7d17c11d74130132a8fe/13676391431.pdfIn PDF document text
    • http://fitviewer.de/files/file/20577557750.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/85310865812.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2552643fedf5deb662efa59dc730785b/ronulagitutigukoxazorax.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/33689970536.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091f2cdd3693---dimub.pdfIn PDF document text
    • https://tonitomov.com/picture/file/kazikotexaxonon.pdfIn PDF document text
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/kopedorukabu.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da40e4b275---65460116538.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/mavirorajuda.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/fopetak.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210607070629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fake+letters+copy+and+pastePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFF 22020 bytes
SHA-256: f791e0c0c474a583bae043c347037ba4e81835578f1ea28d25aeb7294b88cd7f
font_02_sfnt_off00016494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16494 33640 bytes
SHA-256: 20a42e7d3c10615d28b556715b09cb57d4bc9a38e56d76902a225a44090d1092
font_03_sfnt_off0001be67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE67 10600 bytes
SHA-256: 9441a9d840871c3ad978edcc12b7d67e551ef6d62237531adc9f7b948dc42ac8
font_04_sfnt_off0001d6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6C9 1732 bytes
SHA-256: 8b7f93a317d1604ac9fd1e37414e6d11e55ded64e8fb8e4e1293edca7190eed4