Malicious PDF — malware analysis report

Static analysis result for SHA-256 06301935edb68309…

MALICIOUS

PDF

72.8 KB Created: 2021-02-20 20:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ee80c078717ea3b89b1087b4e60ff3b4 SHA-1: 1c406df09c75b2c4ff07b578a194c8ae428e20cb SHA-256: 06301935edb683094f1e41252d2ff328ac0bcaa9ad1d0394726fb60c3ffd4f1e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via the embedded URLs. No scripts were extracted, but the PDF structure and external links point towards a common phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=2018+maserati+granturismo+mc+horsepower PDF link annotation
    • http://sukujugonada.22web.org/form_arcosanti_instagram.pdfIn PDF document text
    • http://waystep.site/neurological_disordernqaz6.pdfIn PDF document text
    • http://damvglaz1.xyz/believer_drum_sheet_music_easykh9h4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_602c90ab911e4.pdfIn PDF document text
    • http://zunikezat.22web.org/99770637197.pdfIn PDF document text
    • http://storeeu.info/does_kaz_love_inejwe4bd.pdfIn PDF document text
    • http://dress-russia.ru/closest_harkins_theatres_to_mew6yxn.pdfIn PDF document text
    • http://xizabif.22web.org/best_order_to_read_batman_comics.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/dafidefu.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/3175578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_600c4b8fa0288.pdfIn PDF document text
    • http://stat-index-co.com/mupekuwebemuvejavgg60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468267/normal_6007e72f93bb1.pdfIn PDF document text
    • http://buytoday.cc/61907265136dyxws.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/pebisax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupofisawum.rf.gd/bijusutoveb.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_off0000dcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 5832 bytes
SHA-256: d23fbcac45ac3c716f9f6a79921ec3db5995d58abfc73473a635976e384b66fd
font_01_sfnt_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 11052 bytes
SHA-256: 0dca328a20daa2a1810fa1514bee187ba616fd1f4e88daa747248df460b7a045

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