Malicious PDF — malware analysis report

Static analysis result for SHA-256 216c67d401965a3f…

MALICIOUS

PDF

75.1 KB Created: 2021-06-08 22:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6e9e7d89eadac023c27bb98525253e13 SHA-1: cc6b69853a79b74cdf65eeb269885e79d0d8962c SHA-256: 216c67d401965a3ffa2597f23054aaaecdc729c84112fc82d156eca7bef76243
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The primary URL, 'https://smidgel.ru/pbw?utm_term=watch+my+hero+academia+dubbed+online+free', is presented as a lure for popular media content, likely to facilitate 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 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.
  • 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://smidgel.ru/pbw?utm_term=watch+my+hero+academia+dubbed+online+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462350/normal_6008dd9a15b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fd198f7cde48.pdfIn PDF document text
    • https://kebekeloku.weebly.com/uploads/1/3/4/6/134639455/votoxatogi.pdfIn PDF document text
    • https://zegazofegu.weebly.com/uploads/1/3/5/2/135296009/8c825cf6c23.pdfIn PDF document text
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/fabiwibedepuki-kafuzakomepigo-nibokirubeg-xonefenivebaven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421333/normal_606352a8d5d4e.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/podufujibaf_wuwom_xadagorixi.pdfIn PDF document text
    • https://zedafirulatako.weebly.com/uploads/1/3/4/5/134584693/45f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_60b9e6fda6c24.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/4255630.pdfIn PDF document text
    • https://vawosogujatu.weebly.com/uploads/1/3/5/2/135293246/zaxonexutuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5fdb36975bf08.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://vatojorisa.pbworks.com/f/fidelity_net_benefits.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/f/17414851915.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/power_system_analysis_and_design_j_duncan_glover_solution_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD910 5220 bytes
SHA-256: ec87ac1292eca461b83dfa7e12b72563ed754168e22cdabcdd7060b5cb2add94
font_01_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 11424 bytes
SHA-256: 8e881b48ba4ec94a8100160f750627bee75dfacc9fa59c930963e57d90bcbdb1
font_02_sfnt_off00011141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11141 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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