Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b6259bfa979175…

MALICIOUS

PDF

108.0 KB Created: 2021-03-05 04:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 27be44f8894d62d5c383edd649845a53 SHA-1: 94586684187db27b13ef2b0f06706117faeef136 SHA-256: 04b6259bfa979175817a9a86240da42875cd7f08f052026f2bf015e0ef20a5ba
186 Risk Score

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://xajibur.ru/award?keyword=grammaire+francaise+en+ligne+exercices PDF link annotation
    • https://cdn.sqhk.co/jugomuzuteb/FlPjjbJ/brain_training_for_dogs_free.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/mamiburemawurezowep.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/wafutewanozol.pdfIn PDF document text
    • https://denalozi.weebly.com/uploads/1/3/0/7/130776502/gerugadut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5fff951f49953.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/widajidexokimurolobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_6039043fc3341.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/gdAhjia/73284838750.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411501/normal_600553a33897b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5fe5b6c9d2c72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501503/normal_5ff4beb53e429.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/jRidIjj/indie_adventure_games_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383314/normal_5fde85152d9bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_63a6872d8b7f414db7185a5966de7e88.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_efd303da9e7748e997c589353d6fae48.pdf?index=trueIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_f64f4cc0553847ad85d3971d25c942d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/dujasalowaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/pafuxuluneroxatotog.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_off00015b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B08 5300 bytes
SHA-256: 568c49db3f9e6b16f5e38cde9925b728df39d4e4e3867593514d5583279824fa
font_01_sfnt_off00016d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D04 18088 bytes
SHA-256: 6ba00d96be8c388148491e70d096d96a3f2578e82e5d935b67d6a5211de1c1d8

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