Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3e76c29b69b969…

MALICIOUS

PDF

73.0 KB Created: 2021-02-19 14:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5a81deb85cbdb6eaaa561c1a6bdbfc12 SHA-1: b9d1991038fa37ef0c8a0c1b76979ca8072fe71e SHA-256: 9e3e76c29b69b969d1098e6b87d76a966b1a36fb371f60dcd9e58d0603ed7a84
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with one specifically identified as a malicious lure related to 'maypoin.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous links, many on disposable hosting, suggests a link farm designed to obscure the ultimate destination or spread 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://maypoin.ru/strik?utm_term=mastrena+2+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470220/normal_60207cac6bd7f.pdfIn PDF document text
    • http://getsalle.xyz/sowegeleu9u72.pdfIn PDF document text
    • http://optamorem.com/773184974004c110.pdfIn PDF document text
    • https://ginuzakonufa.weebly.com/uploads/1/3/2/6/132681862/bopugemunajixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_60147033ba1ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5ffccb443cc01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479236/normal_602ea7b4ed5d5.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/7241355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5fcf204128a34.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/1534612.pdfIn PDF document text
    • http://bobatukuxoto.iblogger.org/noxefim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fimageparoxa.rf.gd/windows_movie_maker_intro_templates_free.pdfIn PDF document text
    • http://pisexudovekozus.rf.gd/bioreactor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/trombone_sheet_music_jingle_bells.pdfIn PDF document text
    • http://nuzuzetopodufi.epizy.com/32783077664.pdfIn PDF document text
    • http://tolimimagag.epizy.com/32106009770.pdfIn PDF document text
    • http://vakisetituli.rf.gd/how_to_bypass_limit_ios.pdfIn PDF document text
    • http://zupibejozoge.rf.gd/elkay_water_fountain_drain_parts.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_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5032 bytes
SHA-256: 0c747105445f0a133a30454bf4bd6dab80b566073858aeda6b3aee9c57a6fd43
font_01_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 10684 bytes
SHA-256: c51041aeb3852793583c680120657ec42a82eb79ad4630c08ba3960c1779b78a

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