Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c30ec6c660188e…

MALICIOUS

PDF

79.1 KB Created: 2021-01-24 23:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 62272ecb0d5de6a0de454b986e108d33 SHA-1: 2547f092782fc27492ddada4bb9bed6798206db9 SHA-256: 67c30ec6c660188efd84e4766daa4182dcb6e6dfc6c2b10dab7665584ac43b20
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=rca+ant751r+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fd5fbaf13aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_5fd771a789f52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fccfdaba50ba.pdfIn PDF document text
    • https://cdn.sqhk.co/polirorenu/gooCbii/galeputuziwin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_5ffff29dacac0.pdfIn PDF document text
    • http://7lessons.website/jatuvewapze5vi.pdfIn PDF document text
    • http://thesimplycompleteseries.com/tobisogewadonofalodagus4iqc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5fdf621bef83f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_6008f2c113984.pdfIn PDF document text
    • http://monoga.space/egg_claw_machine_toymv9kp.pdfIn PDF document text
    • http://fofafik.iblogger.org/xejebanigemideja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sekijipaladi.epizy.com/gapujizufidelir.pdfIn PDF document text
    • http://dulefuzobov.rf.gd/tegigebososebasorozuxi.pdfIn PDF document text
    • http://jubadoloje.epizy.com/string_theory_math.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/84049454139.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/ivd_clinical_trial_protocol_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/zawinefatanadakumolofog.pdfIn PDF document text
    • http://zepedijuva.epizy.com/fractured_movie_netflix_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/21889614865.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 4636 bytes
SHA-256: 4b79c8092fb93e89db6ab4493b20bd86695ff6dc45668fa727c29c44a3c831e1
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 10728 bytes
SHA-256: 4860678157ad3d9dfbca02c1c2a8d018888798f6edde0e7eccd97073e880882a
font_02_sfnt_off0001218b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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