Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c8b91ea0b7901d…

MALICIOUS

PDF

73.6 KB Created: 2021-02-23 10:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1952c146666c23f9c990a64cfeecb2c5 SHA-1: b967f71301f030c05ada769180a9aca9585381ee SHA-256: 94c8b91ea0b7901d34d44de5ce556521c12971946edeb04bf61f26bf20f8e3d2
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains multiple embedded URLs, with one prominent URL being `https://jottigo.ru/strik?utm_term=why+is+there+blood+coming+out+of+my+cats+eyes`. The document body, though heavily obfuscated, appears to contain text related to the search query in the URL, suggesting a lure. The presence of numerous links on disposable hosting further indicates malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/strik?utm_term=why+is+there+blood+coming+out+of+my+cats+eyes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367960/normal_603330c099fdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_5ff44849c93fc.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/ihjfDWV/contact_lenses_cost_uk.pdfIn PDF document text
    • http://salejozokaboruz.22web.org/anime_slayer_apk_iphone.pdfIn PDF document text
    • https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/8142205.pdfIn PDF document text
    • http://nagesebaz.iblogger.org/federal_sentencing_guidelines_for_organizational_defendants.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/88da72acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_6030abec91f66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxomexepus.epizy.com/children_s_halloween_mask_templates.pdfIn PDF document text
    • http://zawumowu.rf.gd/bivunufopetawokaso.pdfIn PDF document text
    • http://momugegunimex.rf.gd/gusilewikag.pdfIn PDF document text
    • http://mujixexebekipan.rf.gd/82229147156.pdfIn PDF document text
    • http://gumusijejokezit.epizy.com/construction_company_logo_design_free.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_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 5692 bytes
SHA-256: 2d1284e3b4b381b9d61885efcc0ddec4992d1b3f7abf1e74c921da16be8b1d7d
font_01_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 11084 bytes
SHA-256: ebcfb8d8f047dec5681990b4c18b1205c6490d1f525876902d3f71593dd51032

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