Malicious PDF — malware analysis report

Static analysis result for SHA-256 6208952de85339ce…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 01:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5a57ffd4b5760d2c992902db59ca83de SHA-1: d666bb0dbe4d0c7c5823ab6b8841a866d10e3905 SHA-256: 6208952de85339ce7061c315091421b5de19a8322d90ab80e015fc8f4c85c134
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70d4b88a2b---80936874570.pdf In PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/87a681c442c8df68e465ce6e7b207623/2938126597.pdfIn PDF document text
    • https://papiratisk.cz/soubory/dutipiwop.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078398827ee7---lexalef.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0737a426c9---jerogudawip.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/limixuwoniwafikipix.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/80646802203.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/e7c807792c26142a4c9ce846c44c20f5/volekexazeribibejakagofu.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/69601237602.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/91875828668.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/32243510785.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb912a32df5---sikaguti.pdfIn PDF document text
    • http://etre-belle.su/images/file/44435614722.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/pimivuwomeno.pdfIn PDF document text
    • http://mgrima.com/files/file/rakedopinus.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/91263649142.pdfIn PDF document text
    • https://diphong.com/uploads/pamulabepuvaxivaf.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/44e588b937ed86d12baced897df2cc00/bivozafexusujexutus.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/1jfujlvsn7apjaifdgvoisskub/84424051916.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/67685948330.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/df80b39c6655a3636a758af342e76829/84896034875.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/c87d11cf6c32ecdb49d2f0cb77bcd815/ritufet.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085231e7a2f6---buxagez.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/36526101718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+redistrictingPDF 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_off0000dd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 16200 bytes
SHA-256: 67f13de6758a1d9310a514b857df5f9563331d7c4669f511adaf7c47b31f01a0
font_01_sfnt_off000106dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DD 10596 bytes
SHA-256: 20413513284c9ffb56701f4265da99e5dd24ca2a22bca4e015a64fa97b7e5379
font_02_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1