Malicious PDF — malware analysis report

Static analysis result for SHA-256 567a2f8d612a46b2…

MALICIOUS

PDF

68.1 KB Created: 2021-05-14 23:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4e78a836fa044ce3213b6931c1323b92 SHA-1: 81af55dddbd1f79921b5897b1b8cf358af14ef75 SHA-256: 567a2f8d612a46b2641299a0ebb32871ddfa2300cba80f97f33830c6d827153a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://xezojetit.ru/strik?utm_term=the+seafood+shack+houma+louisiana PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464863/normal_6037493f894e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448341/normal_5fef96f749d29.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/vjfTijy/mirror_lake_colorado_directions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_606255ce1346f.pdfIn PDF document text
    • http://situvupumu.medianewsonline.com/rabotidirujawewuxafepa.pdfIn PDF document text
    • https://kololopobiro.weebly.com/uploads/1/3/4/8/134853362/2066771.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/hjghdXB/wugijofedagejijafovoli.pdfIn PDF document text
    • http://rawuzexo.iblogger.org/79387527186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_5fea05bc409a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5fff513aa796b.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/hagfahf/dumopuwesanog.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/iggd787/xitigokosem.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/jupusigafirumagezugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_603a97a36db5b.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/38171928133.pdfIn PDF document text
    • https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/xobanuriru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_603d2a4db8816.pdfIn PDF document text
    • https://maraduwiz.weebly.com/uploads/1/3/4/3/134363873/1579819.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/ZZicjsE/wakaxomagudawaxaxen.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/govagafigixanu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didoruvevesipug.rf.gd/58381719233.pdfIn PDF document text
    • http://zekazamu.rf.gd/fundamentals_of_molecular_virology_second_edition.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/zuvijadufoti.pdfIn PDF document text
    • http://bopewexe.onlinewebshop.net/solidworks_assembly_tutorial.pdfIn PDF document text
    • http://vinegufoxa.rf.gd/balance_sheet_proforma_schedule_3.pdfIn PDF document text
    • http://pufaperimixalet.epizy.com/web_url_to_converter_online.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_off0000cdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCF 5176 bytes
SHA-256: 05be791adfcec9f1bcac7db77a1dd537e21296cc8cd794b3fa540f129fcb42fa
font_01_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 9928 bytes
SHA-256: eecd244105726ee837016b02b2f24c37d7fae1a2f49ddeb14c7db4d0ba74d237