Malicious PDF — malware analysis report

Static analysis result for SHA-256 86faf8084c362d1c…

MALICIOUS

PDF

79.2 KB Created: 2021-02-20 03:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6e0f31ea625ac38647d2c4e6d1025150 SHA-1: 9e382d0c5061653193d25ecbfc918ab03090e29f SHA-256: 86faf8084c362d1c8c83f4aa77e8a7bd5bd6cf234621a87b3b04c11303bfeb56
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

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://maypoin.ru/strik?utm_term=their+eyes+were+watching+god+chapter+9 PDF link annotation
    • https://cdn.sqhk.co/napumefu/EMuheij/archery_kits_for_beginners.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/convert_file_to_excel_for_free_onlineo5wv6.pdfIn PDF document text
    • https://nufusuninad.weebly.com/uploads/1/3/4/6/134609023/45deb1.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/a9jjMge/heroes_of_war_ww2_idle_rpg_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/mjgghji/kowilokevokiji.pdfIn PDF document text
    • https://cdn.sqhk.co/tugitajusow/g0qBYhi/10346479141.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/ajchip9/dojasezol.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/0b53d312c47aac.pdfIn PDF document text
    • http://drawer.icu/91733980329c7lcs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5fdae76fa064f.pdfIn PDF document text
    • http://persequen.com/garibitare56coh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5fe99b0fcc176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_6001a990957c5.pdfIn PDF document text
    • https://fozaronu.weebly.com/uploads/1/3/5/3/135349809/3962690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_601b3c5f30fbb.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/3576911.pdfIn PDF document text
    • https://cdn.sqhk.co/gomurabog/j2bawjd/64842152100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 5600 bytes
SHA-256: d16ca8c0ddae0a0cc11abe74fc58b6f82e49f822784cdd90c1ee8b39f793d254
font_01_sfnt_off00010c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 10188 bytes
SHA-256: 61df8b5bd70d917583e3cd98045087ccbcfeb0910283a2292c8849f62b979957

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