Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b4ea73b5fffe31…

MALICIOUS

PDF

79.0 KB Created: 2021-03-10 19:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6de660e336d7c4a629c217775070c229 SHA-1: 672313cf9d73e5c0db68e4b3c8697ab17458ab5e SHA-256: a7b4ea73b5fffe310fcb1d551fe0f8e5b78fd319dff4167e7c01423d70f57e99
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's primary purpose is to redirect users to potentially harmful external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/award?keyword=tecnica+septoplastia+pdf PDF link annotation
    • https://kizubunutasi.weebly.com/uploads/1/3/5/3/135348794/de0bff6e.pdfIn PDF document text
    • https://wixoxane.weebly.com/uploads/1/3/4/7/134734379/4990837.pdfIn PDF document text
    • https://kebufuwotum.weebly.com/uploads/1/3/4/0/134040355/potesud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_6007e5d825983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458428/normal_5fedf7d0d43d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5ff9de061eab9.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/fokepabisemaxemepof.pdfIn PDF document text
    • http://premiumpornclips.com/pipewubijllwd.pdfIn PDF document text
    • http://terugate.mypressonline.com/mixekap.pdfIn PDF document text
    • http://myirn.icu/62353455651kz6dk.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/fopamuginusugulidav.pdfIn PDF document text
    • http://organicsss.space/2004_dodge_ram_1500_5.7_oil_capacityf5fyz.pdfIn PDF document text
    • http://ultra0.space/46816764550yokw6.pdfIn PDF document text
    • http://macsk.space/dafiwgbzx0.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/e793a.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/84472447865.pdfIn PDF document text
    • https://xalitive.weebly.com/uploads/1/3/4/3/134320973/7873548.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2221a244-0d9d-4225-ae6e-a1bc1e49c28d/city_of_ashes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfcd8f5-bde0-4d00-94e8-798e8fddf10a/94888987493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b282d2-c4c0-4077-9767-61e4b4f560be/bibatuzofufep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c824e805-03e6-4c6e-8d78-ae1040afd3c5/quiero_estar_seor_en_tu_presencia_flor_y_canto_acordes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf729b5c-f051-47d1-af12-ac946a88fad7/rinnai_rur98i_service_manual.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 5000 bytes
SHA-256: cfd84ed895108d1daa6c2a0cdf280c315c18f7c8fd9e79ee69a9e159b3426542
font_01_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 10408 bytes
SHA-256: 7e935807fb4662c5b02d780c7c479447f4f7bd7e1cbf16ecaee67d6a80dddf72