Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1e5be258e0d5d1…

MALICIOUS

PDF

65.7 KB Created: 2021-03-27 14:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3c2b2567dacb482ab548fc0d0eb1d400 SHA-1: 26cf5536e6600265316cdb747e87af18d781c936 SHA-256: 9e1e5be258e0d5d135490aacb4c220365e888fbe42c44ed2dbd08bf6047379fe
146 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, hints at a lure related to embroidery designs, which is likely a pretext to drive users to malicious URLs.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://midufefew.ru/award?keyword=blouse+embroidery+designs+books+pdf PDF link annotation
    • http://xilexevu.scienceontheweb.net/22839183670.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/Q9gcji1/8528104860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fcb307f22ffa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_602a38c9a8f3f.pdfIn PDF document text
    • http://vuvezalamosi.22web.org/castlevania_bloodlines_soundtrack.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/how_to_fix_my_tv_backlight6a046.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • http://wawovotem.22web.org/bedusapuxukomuderajeto.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/aioli_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc81994efa5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_60502d3738845.pdfIn PDF document text
    • https://cdn.sqhk.co/velovezem/oB6hgOv/kiwuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_605d120093904.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/90422310903.pdfIn PDF document text
    • http://aycotoro6.xyz/home_design_3d_apk_unlockedp52iq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juxudawalugevop.epizy.com/kujizofuguwag.pdfIn PDF document text
    • http://bemabam.myartsonline.com/giuseppe_antonio_brescianello.pdfIn PDF document text
    • http://nesowoxaxisaxa.rf.gd/bearing_nsk_catalog.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_off0000c2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FC 5504 bytes
SHA-256: 9fe4bec43bf212f3b99dc890fa0bb76a87642b6ea03ceb14d756a8d7b8c386a3
font_01_sfnt_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 10720 bytes
SHA-256: c7ee66cd922a84ec6e7888cc20f7f1a5d780132247ef412834963580e29e5e73

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