Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad5476ad2b32e4c…

MALICIOUS

PDF

83.0 KB Created: 2021-09-02 02:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3129695661912e831f0ff37f8330f18 SHA-1: 34d65d1ea8f8e96dc1c5f94f1b35cad87c09059e SHA-256: 0ad5476ad2b32e4c751634f4692b601a8a84008561205d791be256a3260ffe97
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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
  • 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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/da3080716c2cc2a2bce27507942a14a6/jaxixipabezozowirip.pdf In PDF document text
    • http://yjsyrj.com/userfiles/file/lamupi.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/1828033322.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f1509391---lomenetanomofuput.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611ce4e673e35---22104720517.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/11089301326.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/95656300107.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/81201747326.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2623f83980---44827511335.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/xixagazisekuxosidukuwub.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/82991656252.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/kujezifuwawunopalakev.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/lofilowivivevebapel.pdfIn PDF document text
    • http://guowangcable.com/d/files/pesuxagejuwavi.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a16e056f2401cf99ace17c9a6ae9a0e8/jabisepine.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/80afe069fbaf0b7985c15a2a6ccf0e74/35876194903.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210716202754_01k3x9.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607515ead7019---gidujizadonukevakutijubu.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/tegujevoxamakorebibobu.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/nilijerafimoras.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/3321485489.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/jafovodesan.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/49471472707.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/gefevudibabogifila.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/dupeteguliwidew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+do+ferns+reproduce+sexuallyPDF 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_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 17080 bytes
SHA-256: 3bcd7f91a463a51c5a0ef516b8e7000d8ee62ee699eb451aa19cd8f0c80a7ae6
font_01_sfnt_off00010d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 10816 bytes
SHA-256: 5d371473ebdd208fc4da0a95f01251bf142dd39ac55a9f4bc00b69a7b94dcb09