Malicious PDF — malware analysis report

Static analysis result for SHA-256 59065c383fd805ed…

MALICIOUS

PDF

144.6 KB Created: 2021-06-11 03:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 86acb333f85751918688c7293b335277 SHA-1: d2e8b0f772b42924f2de112668fc7f6da17d1d85 SHA-256: 59065c383fd805eddd01290c1cb72de886c20054c0a8e398e83c908f9644590f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious document, including ML classification and ClamAV detection. It presents urgency lures and a call-to-action button, directing users to external URLs. These URLs are likely part of a phishing campaign or a download chain for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=english+file+intermediate+test+key PDF link annotation
    • http://maychamsocda.vn/images/userfiles/file/misovovemeriteridalin.pdfIn PDF document text
    • http://huiking.cn/uploads/file/180315104768.pdfIn PDF document text
    • http://temple.mo/userfiles/file/wobosapodew.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/zenuda.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/sumezegenovoravefi.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/47670684070.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/4c4643f097e44a4b9f04b3757e7b2ccd/33192727436.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099f21b62c1e---93948445977.pdfIn PDF document text
    • http://blueyee.com/upload/file/201848437173.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3pcpshivj5vjl4ecvlbc8vmqp1/xotamawafasuji.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/37f1b5d07702c0392a52ad0d9d9f9841/famob.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/72110532895.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/295efb5f01a31c64c946695fa6777ee7/reruz.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6d4292fd8193c94eae2a5c991e62e873/47539655066.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b52b8761e3f---53794284679.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210524220056.pdfIn PDF document text
    • http://klefmarken.se/upload/file/64069017471.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210531025937.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0001d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6B0 1604 bytes
SHA-256: d61375622b9e918e10bac100a1eb342a84b314fc0131c434b35f2bc17295445f
font_01_sfnt_off0001dead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEAD 5444 bytes
SHA-256: f5b33a84b94736f7a5ff49396d7497920a5a4c1edec581238bf304a9b5d2335e
font_02_sfnt_off0001f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F113 13444 bytes
SHA-256: b4aef8972d1dbdb6e9f828455f2802f23506e21a69a942b826de366466e2c380
font_03_sfnt_off00021e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E4A 16348 bytes
SHA-256: 7ea4ad8fabf58a022be5f422cdf71e1d18c834a5727f5ba12988ec6015bab3a1

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