Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abdf7eb7d161545…

MALICIOUS

PDF

73.4 KB Created: 2021-03-11 07:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9150362dd591adf4915331d1e88b471d SHA-1: b91a3d7307336b45d3d60f040f110bd8a18af54e SHA-256: 3abdf7eb7d161545e6fce75ab288a8f24dc94663f94403a9e0c63e93b3d56a93
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://fokemale.ru/123?utm_term=apa+title+page+template+google+docs PDF link annotation
    • http://zatoboyvibor.fun/40308958033do39r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_602a1fc27e578.pdfIn PDF document text
    • http://7gusevshop.website/lotenabovawaridogexrk9b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_6016c38832af1.pdfIn PDF document text
    • http://thesalle.xyz/dodoleramedaxalovez3c6q1.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/4HgfQha/44818769893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_603e6b94b938b.pdfIn PDF document text
    • http://doctora.club/butijgmgn9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_601b656d9a7ae.pdfIn PDF document text
    • http://baby-slings.ru/309703114416vzqi.pdfIn PDF document text
    • http://top-salez.site/87943631445hxqtp.pdfIn PDF document text
    • http://help-business-media.com/biosystem_cheque_writer_ec-_7a_manuala7gkr.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/hiVIjam/42863854349.pdfIn PDF document text
    • http://italywom.space/horror_monster_simulatorz4zcs.pdfIn PDF document text
    • https://cdn.sqhk.co/bepigulusibe/idggKid/world_rally_championship_playstation_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_6025ae057f98d.pdfIn PDF document text
    • https://cdn.sqhk.co/pixukinoma/dl6giE4/strike_fighters_2_north_atlantic_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_19e9359284f745f58b7cb851ef561d20.pdf?index=trueIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_77fae1e254f04dcd96ba6231a6d97aa2.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_657e6264e5b249bc95a200c32ade8c89.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_a3d958bb30bd4a46826d0b87ae9cb215.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_b42bf942ecad4b9aa23dc5ae92f24ec9.pdf?index=trueIn 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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 5288 bytes
SHA-256: 7ccdaa11f3223cfbfef8a3d2f0d8600ed31e6e6756f2b4b92361c04264633c33
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 11420 bytes
SHA-256: 81164a2f9894dadbe41dd0e9e21d5b0095c475747414478a9be24ec4f06a6e23

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