Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e2be861d224cc6…

MALICIOUS

PDF

78.7 KB Created: 2021-03-03 18:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6558f888f7e2e22ef32238686e694a6d SHA-1: 5ef9a45cc52f5a464fc0d19839904cb3d0c8423e SHA-256: 04e2be861d224cc690aa58d399bc35c96c62df193fd5e9833264f449f617796d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains text suggesting it's a lure for search engine traffic. The embedded URL `https://seumenha.ru/strik?utm_term=what+is+the+directv+remote+code+for+vizio` directly supports this phishing pretext. The presence of multiple disposable hosting links further reinforces the malicious intent.

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://seumenha.ru/strik?utm_term=what+is+the+directv+remote+code+for+vizio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385028/normal_6012c969bd84f.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/nutopaludomufanefusuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/0yihjhc/street_wars_pvp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_60029b340da6f.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/xulasigefotitib.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/todaguzepuwafovoka.pdfIn PDF document text
    • http://jodujimapiwox.22web.org/free_online_car_repair_manuals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_6023ae253d9cb.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/WGiejgz/black_friday_deals_target_tv.pdfIn PDF document text
    • http://study-english-04.space/good_night_pictures_for_whatsappw5nqa.pdfIn PDF document text
    • https://cdn.sqhk.co/naxiwakiwuv/TDiVpv4/trishul_defence_academy_bareilly_fee_structure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456420/normal_5fe45209c58dc.pdfIn PDF document text
    • http://giveaway2020.info/are_buffalo_extinct_in_the_uslzudx.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/gezjhjg/murder_hornet_nest_found_in_the_us.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_60148fa570151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakigekoxigukil.epizy.com/74217563515.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_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 5352 bytes
SHA-256: 5881a14be2f67f3b7f01b6120373d7a273570cee486bb9ca6eae0442350158cd
font_01_sfnt_off000106b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 11388 bytes
SHA-256: a1aafd3d1da7c2126edf4e8f16d60dbe574d4fc5eaf806d9751863dc33f1206f

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