Malicious PDF — malware analysis report

Static analysis result for SHA-256 582d7849477afc8b…

MALICIOUS

PDF

65.0 KB Created: 2020-12-26 13:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f01c0fe87e2259ab1ad2b76af94ce118 SHA-1: e69f6a455acc37092cc5bbd8c6ed1eaed937fdfe SHA-256: 582d7849477afc8b79d3eb1a894de49febb83fc3d8bd0fa7994d06cab00948e2
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. One notable URL is https://traffine.ru/strik?utm_term=bluetooth+switch+missing+windows+10+dell, which appears to be a lure related to a technical issue. The PDF structure and link farm behavior are consistent with phishing or malware distribution campaigns.

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://traffine.ru/strik?utm_term=bluetooth+switch+missing+windows+10+dell PDF link annotation
    • https://cdn.sqhk.co/vawikepaf/RIQDaCz/xoxoziwaripad.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/dTigxia/best_free_open_world_games_xbox_one.pdfIn PDF document text
    • https://bolusawowena.weebly.com/uploads/1/3/4/8/134894851/wuburazoteborox.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/5b8hfB3/lonerojujagedekorozusuku.pdfIn PDF document text
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/domefenog-lenixofez-wagakeke-tutinave.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/4a90eaba6.pdfIn PDF document text
    • https://jitogemokafizal.weebly.com/uploads/1/3/4/7/134737933/kiwafaxilarup.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/ThjZ5ia/setilosovewenigowuw.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/7079189.pdfIn PDF document text
    • https://cdn.sqhk.co/kowazodonaf/hd7QifX/maxis_match_cc_long_hair.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/lasorogukod_zidofopafogi.pdfIn PDF document text
    • https://ronizozobofer.weebly.com/uploads/1/3/4/6/134654069/rabaxarikuxirut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/37792683467.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_off0000c360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC360 5384 bytes
SHA-256: 1675e4583f40d84b2924ec34531d3236d3fd971ba14f2787095a26eeb44ef391
font_01_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 9792 bytes
SHA-256: 2be3327bb4f01d3c52f0c1905c162291db60f46e542fefe241e093f2c2e4e5b0

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