Malicious PDF — malware analysis report

Static analysis result for SHA-256 061a5aac78242196…

MALICIOUS

PDF

93.3 KB Created: 2021-09-01 17:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f44e3e75dca7742281e3a880f3511d26 SHA-1: 875e8db704adb2a693d2f63c3470ba89dab8d5d5 SHA-256: 061a5aac782421961f51d76f51a19d8d11119b50bcde8b714ed10190a08e5b67
164 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the link farm structure is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/aa34bfd990843073ca89602df110b79b/45261372803.pdf In PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/e2e21262298a68eb485819797d797e84/loneromatuxeve.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/fosevelixijevupuzalez.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/64317604163.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb1095379d---92781630012.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///zakevulevikot.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c9308c122c1---bepegofutiditifakakizefez.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/43837651248.pdfIn PDF document text
    • http://stavbyhes.cz/ckfinder/userfiles/files/rubavojexomexitiki.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/duvofupizifegato.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087282410a00---30691505013.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/d3b51f588ca15a5ffe6cfe1e90d6edac/52137665988.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/fubit.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d92939298b---14734714347.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/11308634211.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf482d86a8---dikivajusaxi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/j8u6gliemrsd87tsslfupcgr35/51809467789.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/23e9fecc25b202cf9fdcc48dd7b5de18/silegifetitizojakibekagej.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/35962b188317c7776656f87d10d2041e/57273152186.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/lerelixojixupen.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/rekab.pdfIn PDF document text
    • http://midel.me/userfiles/file/90089171116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=my+stomach+feels+heavy+and+tight+am+i+pregnantPDF 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_off00010615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10615 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E27 18212 bytes
SHA-256: ec7a9cf8a21ca21e5a6671a1e5860a377ae59a5213c78f55be70c121c94c3eea
font_02_sfnt_off00014d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D88 11240 bytes
SHA-256: 3f0df1ac7ebb271a93ca10db668acb5a59c6393e140cebeefa171664750203cc

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