Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ba34f25bedb7c0…

MALICIOUS

PDF

78.2 KB Created: 2021-05-12 19:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6197e3d02befd6689958c90a101c33e3 SHA-1: 193719c408a92118558dbb27da62d884516a489a SHA-256: 39ba34f25bedb7c06e9dcbefebaaa68bcc4ece63f970770d77bb5fd7b94cf7d9
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body text, though partially corrupted, suggests a lure related to skin care, which is a common tactic for phishing or scam campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

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://zajinet.ru/strik?utm_term=como+remover+manchas+de+sol+na+pele PDF link annotation
    • https://cdn.sqhk.co/fizuborugas/hjfaWhf/coin_master_hack_app_link.pdfIn PDF document text
    • http://redirunna.xyz/fugujofenodex35f41.pdfIn PDF document text
    • http://1offpark.xyz/pepudevenitomesa1v4o4.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/SkBJijx/84031665436.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/jmTgdje/25856390017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_60316ef0c45a8.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/gT1YXhd/31065086221.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/a81jiHr/viramesamebekezusilokam.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/ig0phch/37362112533.pdfIn PDF document text
    • http://the-glow.ru/rafefowoxozivokadifagakupwxkz4.pdfIn PDF document text
    • http://impergamon.com/bodas_de_sangre_texto_argumentativo4l9ak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419822/normal_605bf662d0df4.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/jcrhira/20210959913.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
    • https://s3.amazonaws.com/kefodek/pebumirevisileluvurasodiv.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/que_es_un_informe_de_epicrisis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6444efd5-98dd-47ab-85c8-63fe0832fef7/gemam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4685da-ab05-4f9f-b5d0-9bf6f95d6073/how_to_update_tomtom_sat_nav_maps_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/senior_software_test_engineer_salary_in_india.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_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 5056 bytes
SHA-256: e90f25b9b0944ef27de4560040ee4830fcb3793e55a92a64e95212ae1dd86b88
font_01_sfnt_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 12908 bytes
SHA-256: 589de69eb5dc7fa9367993d9a1950c53a424446338ad9ee91eb4b1f689dad140
font_02_sfnt_off00011d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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