Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae34b8a429e2eb3d…

MALICIOUS

PDF

77.9 KB Created: 2021-02-28 18:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6f46e59de919e511da497c7c15a473b6 SHA-1: 2d56e0627c71e38ec48af08cdbdbec24a2496b07 SHA-256: ae34b8a429e2eb3d5fa2a73291683bec7ad15496fa10d82e27f4ed2e8d644c32
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm', suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The primary URL, 'https://fokemale.ru/123?utm_term=monster+2004+anime+rotten+tomatoes', is presented in a context that appears to be a lure. While no scripts were explicitly extracted, the heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous external URLs strongly indicate a phishing or SEO manipulation attack. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://fokemale.ru/123?utm_term=monster+2004+anime+rotten+tomatoes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b63bdbdf7.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/1988542.pdfIn PDF document text
    • http://operationhomeplate.com/audio_joiner_program42k5k.pdfIn PDF document text
    • https://lepifokofufup.weebly.com/uploads/1/3/4/0/134018260/7239845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_6023c945a44b0.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/pevazoxazunu_gudid_relegeguxolik_lowofadadabonuk.pdfIn PDF document text
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/gewozex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_601b9adb85654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_602c9ea81456a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_601ae13aa0f6c.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/wotodedaruzuk/emerson_nature_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/detakakisogazokapesigemuz.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/84115573780.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/bareilly_ki_barfi_movies_counter.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/sivetabukep.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/51325618404.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/how_to_draw_anime_books_online.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_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 5164 bytes
SHA-256: e74ffa7cc58ba6995a67b886498325537b7d42e580f9ab7a7561411025fb0f89
font_01_sfnt_off000106f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 10472 bytes
SHA-256: 1a252a6eb7ded5c23ff04402446ba3388549e557ce8c190ca422fb257f292cdc

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