Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb504e8cb0019e2…

MALICIOUS

PDF

78.1 KB Created: 2021-03-30 19:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 982a6cc9264162e4ef384e63240e5ed3 SHA-1: 563c0177c48fb33bf339a839e6e1d3376b6232fe SHA-256: 4eb504e8cb0019e26f050ff1cb4bc96320d8e78333648a546bc6800507fa0f17
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 0.9997

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://baarspo.ru/award?keyword=atoms+questions+and+answers+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418180/normal_5fccf11d15d10.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/16848221048.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/vupikekufuzasonerobubudu8ewfj.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/lovaf.pdfIn PDF document text
    • http://magazinrf.xyz/86867183559xg225.pdfIn PDF document text
    • http://lixebafevoku.mypressonline.com/71647147442.pdfIn PDF document text
    • http://wordwild-store.com/empire_at_war_forces_of_corruption_mvfok6.pdfIn PDF document text
    • https://gikositaga.weebly.com/uploads/1/3/4/7/134773380/8dace0b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6042e00583f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_60601b07f3335.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/b159a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_6044f6265290c.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/jumilogovujevolatatedugez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_602ea3543ac08.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/kewomiresirilule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xogaduzop.atwebpages.com/scope_and_functions_of_wto.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/antigenos_e_anticorpos_imunologia.pdfIn PDF document text
    • http://sefowolo.atwebpages.com/serezawuxovolabafixu.pdfIn PDF document text
    • http://rikuworubit.myartsonline.com/25449371456.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_42a23b5868694b1d8fca8e399c9ebbd0.pdf?index=trueIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_f95043f112b749ac812206543767f35b.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_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 5360 bytes
SHA-256: a67ab56ccc6edd9b23259783a628cfe3eeee5e99fb722ce7e06b75ebb34b99c2
font_01_sfnt_off00010503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10503 11352 bytes
SHA-256: 43caf3db393e6e1c83db67f2cbd1beb643eb9680188fb77dc90913455eec7868

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