Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6dd959ba50beb7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-22 17:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9d33b4314fcb94a62eb502e6555b29b7 SHA-1: 7bbbe75338fcbbf7c9c688c8d926b1d390b6c5d1 SHA-256: 2e6dd959ba50beb7cbb0a386110e6aae3ccbc1290cdf98afbf5fce2efe0c94a4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'pubg uc free generator' keyword in one URL indicates a lure for potentially valuable in-game currency, a common phishing tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=pubg+uc+free+generator PDF link annotation
    • https://cdn.sqhk.co/rilaraviror/gjyhjje/runescape_maple_tree_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/VgRhj0G/vosenumefubebukulafi.pdfIn PDF document text
    • http://white-x.fun/87904659572q4h5q.pdfIn PDF document text
    • http://taygerr.com/60570029331ziogx.pdfIn PDF document text
    • https://cdn.sqhk.co/litanamamusi/jtejbhi/61809114914.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/iifhaje/unredeemed_movies_anywhere_codes_free.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/T8ufMTD/bunny_carrots_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_60187e0783729.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/gcIjcZE/devil_riders_bike_stunt_game.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/cshejj0/6469850015.pdfIn PDF document text
    • http://plusstore.pro/502831892043v1jg.pdfIn PDF document text
    • https://bewosugug.weebly.com/uploads/1/3/0/8/130814774/movawigin-xutofidepa-xiwudugav.pdfIn PDF document text
    • http://tajavimisafom.22web.org/analise_swot_conceito.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/jYihjfb/6085232934.pdfIn PDF document text
    • http://stroiline74.ru/ejercicios_de_acento_diacriticokqav2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajowisomipuw.epizy.com/92697622487.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_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 4980 bytes
SHA-256: 6ede39d08a730d7721f345301b1e56c9841b317d170945d00798d6ef8f300b86
font_01_sfnt_off0000fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 10392 bytes
SHA-256: c2375380b4e6c837c6bf95cef66f0c466fd137a68a59e421bf6d66ce2d0fa06f

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