Malicious PDF — malware analysis report

Static analysis result for SHA-256 304c2219164a0a94…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 15:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3eb2981b637daa6dbc668f298bb27ce7 SHA-1: 3123702cfb0a2252744bd6b45e21a6743cafa509 SHA-256: 304c2219164a0a940a8ba144972bb634fab99a4b68e9002c645f7aba1d60ed2d
194 Risk Score

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 high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to video game cheats, combined with application metadata, to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=super+mario+bros+2+nes+cheats PDF link annotation
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/genegimawuxa_wisilumazujeze_losonelep.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/gdgcjeu/67355631396.pdfIn PDF document text
    • http://potunof.22web.org/how_to_use_boss_ps-6.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/dxhasyf/75737378292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_601e7444f415e.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/6hjugic/murafebu.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/Qhhcign/xuzomamibemilodefozuzaxi.pdfIn PDF document text
    • https://golasirase.weebly.com/uploads/1/3/1/3/131384643/5001863.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/BidhcMU/teramoxaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_60111cf3d6219.pdfIn PDF document text
    • http://difewemizotik.iblogger.org/52309203329.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/msliKid/tumblr_page_layout.pdfIn PDF document text
    • https://namatevugaveri.weebly.com/uploads/1/3/4/3/134350782/1558515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nowokil/loralevatajigixorimude.pdfIn PDF document text
    • http://nitovotiroxe.epizy.com/feudalism_in_europe_answers.pdfIn PDF document text
    • http://furofazitogo.epizy.com/votoxagolune.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 5400 bytes
SHA-256: ab5e24c735ddec8e28144ee9affb4b70162e83543a1b7560b6b024b7b390ae1d
font_01_sfnt_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 11608 bytes
SHA-256: 349100a412c90c0096aaf79028285b6efa8dfd7d7ab7b6d3a75fd511eaa6fc52
font_02_sfnt_off0001085c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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