Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0679bac1c71046d…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 02:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80483b97181c1e1f31594599d42b5e2e SHA-1: ea13b0a74dfb6c3fae74cc6c2c1548f9f4b35d4d SHA-256: e0679bac1c71046ddc03308115111d2bb11e11fa0a2e576a929668d311d63122
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs points to a domain associated with potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=capitalism+without+capital+pdf+free+download
    • https://cdn.sqhk.co/jivonaxadu/hbjehcn/95030418647.pdf
    • https://cdn.sqhk.co/mojobugoge/jggf8he/new_ahl_teams_2020.pdf
    • https://cdn.sqhk.co/kadefowuvun/bgfugKj/prison_escape_walkthrough_level_9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2f989c09-f04e-428e-a64a-4d14977117c5/smr_code_chart_navy.pdf
    • https://uploads.strikinglycdn.com/files/0df6b850-0327-432b-83ae-61a40f07cd89/48815501737.pdf
    • https://uploads.strikinglycdn.com/files/d74b518e-8fff-4c95-be5c-3e402cf679a7/why_does_my_dishwasher_make_my_glasses_dirty.pdf
    • https://s3.amazonaws.com/varolexexus/cognitive_behavioral_therapy_worksheets.pdf
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_3e736e42529143e68e6c5b3642e497aa.pdf?index=true
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_0e031b718d1546698933b026c844061c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7c706cfb-4e72-443c-8401-c9b7ec194516/diablo_3_ros_save_editor_ps3_download.pdf
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_bfd4d1d149be4ddd870531520586fcdf.pdf?index=true
    • https://s3.amazonaws.com/fipijife/35145295929.pdf
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_df4eea665efa49b7b1c13bd37827ac32.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7b3effae-5f42-456c-9591-676570240cd5/gafuweza.pdf
    • https://9f1be152-2ea1-4306-981d-bfff62ad382d.filesusr.com/ugd/08fb22_93d57147a7f34237a54b78f84b64700c.pdf?index=true
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_8bbe752111684c73ac2bfe6b02e30455.pdf?index=true
    • https://s3.amazonaws.com/lerezazo/ayutthaya_history.pdf
    • https://uploads.strikinglycdn.com/files/0539dd93-9f4c-4732-ae33-c319bf398aac/zupas.pdf
    • https://uploads.strikinglycdn.com/files/c381c921-a427-423a-89f9-f9e1b0d064ef/pufoz.pdf
    • https://uploads.strikinglycdn.com/files/016397d6-dcd2-4ad5-8e66-c56462c1c291/diarios_de_motocicleta_pelicula_sinopsis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc5.bin
c1fedc001d807c4235a5d875b7fc278613ea4b8a51c0f88711df00578c5d93b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 5392 bytes
font_01_sfnt_off00010eff.bin
7b49bca64bbcfc4406cb98cfe433f890dcd5a1ebc908e33ab692e25efe418492		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 11384 bytes

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