Malicious PDF — malware analysis report

Static analysis result for SHA-256 73cf86f2656fa0ca…

MALICIOUS

PDF

102.1 KB Created: 2021-03-04 21:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 543388b9c858bdd142f33d80efd7822b SHA-1: b2f4fc3d8827c168b507f4488a27530c832a4616 SHA-256: 73cf86f2656fa0ca778fe5ea62eb226547a857c675d65787aa142d10d71ee686
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://dugedepap.ru/123?utm_term=ponniyin+selvan+mani+ratnam+movie+cast+and+crew PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455377/normal_600042842b56c.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/8gghcib/dogujekupas.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/powerwise_2_charger_partscqvlr.pdfIn PDF document text
    • http://gigojosok.22web.org/apache_avro_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5fda474530614.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/cid4G3w/wajira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5ff6a82333b45.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/lateral_knee_pain_exercisesfi2ze.pdfIn PDF document text
    • http://ig-mediateam.net/forgotten_realms_gods_of_deathrhhs3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426421/normal_5ff57e4dd3675.pdfIn PDF document text
    • http://bilkan.fun/how_to_beat_the_labyrinth_poej9x8q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380413/normal_5ff9892e749b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wovugi/mukitokeferugojiv.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_e68f57a57af740f598b4e98600235841.pdf?index=trueIn PDF document text
    • http://zabukek.rf.gd/philosophy_for_dummies_free.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_84d5a269afed49fda2d9c0b727aefd19.pdf?index=trueIn PDF document text
    • http://fekamenuzexogam.epizy.com/gekosuxemigifam.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_3f4b80e277ff49fbb311b3d712c2813d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/98747673912.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AD 5128 bytes
SHA-256: 372ed594f8291a790de81cf91c471518aef1b0f0ec9ffac8c5a788a4d5720dcf
font_01_sfnt_off00014415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14415 4788 bytes
SHA-256: ac3ca4fa6a34dc50bbb3bc17b5539277a8f1996e710ba19546c7c38677d71925
font_02_sfnt_off0001548c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548C 11692 bytes
SHA-256: 5ebdc7b890ca755e7ab11c8a53ad11ea4531ad1d12d8bea4536d4be8c0bc9656
font_03_sfnt_off00017c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C28 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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