Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b475beb3914330b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-11 04:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 841a48e080089595eb07c9f3c38db861 SHA-1: 1ce4eef73032792bbd8b4f06b03bdc8a336e9d1f SHA-256: 0b475beb3914330b8b7cf509ba5b4cd3bf924bbe086633fc8a9c0af806b74ba1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a potential link farm. One of the external URLs, 'https://ponafet.ru/123?utm_term=ansible+copy+template', is flagged as suspicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=ansible+copy+template
    • http://civiliscmq.online/stand_by_me_movie_pg_rating1vye8.pdf
    • http://farvestnn.ru/descartes_meditations_on_first_philosophy_john_cottinghamrvmng.pdf
    • http://kibizife.iblogger.org/bopazabilimuzom.pdf
    • http://trells.space/11249062576yb9wn.pdf
    • https://static.s123-cdn-static.com/uploads/4421051/normal_5ff4b28d5c97e.pdf
    • https://static.s123-cdn-static.com/uploads/4527859/normal_600189eccc644.pdf
    • http://iglivesupportteam.com/lyrics_haley_reinhart_-_cant_help_falling_in_love_official_audio5fs5l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db5bddbb-3f0a-4deb-8d78-cdb92e2c4325/14028777546.pdf
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_b06ba89ccc6f43a1af306c9745669d9e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35aecc0b-be10-4995-94dd-d3745eef5cba/vijifapadinutiduzelijo.pdf
    • https://uploads.strikinglycdn.com/files/dd7184c4-2fde-49c4-8026-27b9ba3c88ea/amount_of_money_in_tax_havens.pdf
    • https://uploads.strikinglycdn.com/files/7dd9b7ef-0b01-4777-b12a-4a9225a94f84/30195055276.pdf
    • https://uploads.strikinglycdn.com/files/c47e65ad-8995-4c3a-8a0f-a66f8904370e/8224602091.pdf
    • http://ranuvukeguzekiz.epizy.com/xotanumuxuduvapuba.pdf
    • https://uploads.strikinglycdn.com/files/3a942d6d-6e22-444c-acc6-ca4577ef0b31/8706653010.pdf
    • http://taroxul.epizy.com/80679066534.pdf
    • https://uploads.strikinglycdn.com/files/7d738b8d-b083-4e9c-8a52-e06fe94cf10e/sabobilujujogamam.pdf
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_e2e567b5827f48aea0dd94bf635a4ac8.pdf?index=true
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_0e5965bb9fad440bb7021f0dd65e67c4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/891dfcdf-6087-49cb-a457-feb752be328c/99841900673.pdf
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_66205f22e9a540479898b69f01da411e.pdf?index=true
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_7afa21dd1285461fb2ca67404ded76fb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d1340de-7f7e-4a5d-a42b-6efb9a59e7a6/dukakomakukatozibizagup.pdf
    • https://uploads.strikinglycdn.com/files/76d83b50-24c1-4abb-99a6-e7f0c4306802/the_experience_economy_book_summary.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_off0000fac9.bin
2bb34a0c9b6d7c8e98959ceccef2097b90e9080a3045bbf675d73c29af41a0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC9 5216 bytes
font_01_sfnt_off00010c7f.bin
a75803209cf8066897abb6b9a6b271f85d64d93ba1bb902face54c4d7daae356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7F 11300 bytes

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