Malicious PDF — malware analysis report

Static analysis result for SHA-256 be176170143c9047…

MALICIOUS

PDF

76.3 KB Created: 2021-04-02 20:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 15f40f5be15bcf9c62d2f5d38002aa73 SHA-1: cf0c08ddc50e4b821b23b663cfd25c83fc27c58f SHA-256: be176170143c9047b83e2c35d325d4409eb23dd094b8d92194d0ab2482060b3e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external links directs to 'fokemale.ru', which is likely a malicious domain used to host further stages of the attack. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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=php+admin+dashboard+template+free PDF link annotation
    • https://gibolavisijubaz.weebly.com/uploads/1/3/0/8/130813033/tugigaremolole.pdfIn PDF document text
    • https://xofebigile.weebly.com/uploads/1/3/0/7/130739964/7906891.pdfIn PDF document text
    • http://gufinatulo.iblogger.org/branding_plan.pdfIn PDF document text
    • https://derugipuze.weebly.com/uploads/1/3/0/8/130814861/643a95f3.pdfIn PDF document text
    • http://rofibopuxi.iblogger.org/volume_of_prisms_and_cylinders_worksheet_answer_key_math-aids.com.pdfIn PDF document text
    • http://verification-help.business/96401139278bsw79.pdfIn PDF document text
    • http://itravelgr.com/sasanibinewitunebupoz6om44.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/susajurofusubafarebaxetu.pdfIn PDF document text
    • http://gufutaca6.xyz/fanugigidisiwugazebgi817.pdfIn PDF document text
    • http://suvonenexazu.mywebcommunity.org/ccna_1_final_exam.pdfIn PDF document text
    • https://lewedizo.weebly.com/uploads/1/3/4/6/134610291/6196441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/99975566739.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/64034786559.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/abundance_mentality.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_b24df3f7a929447887c3be1712f8e9af.pdf?index=trueIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/pl_sql_developer_resume_3_years_experience.pdfIn PDF document text
    • http://lifotag.rf.gd/84015529288.pdfIn PDF document text
    • http://pewulalabes.epizy.com/nomolovuzojat.pdfIn PDF document text
    • http://woferepabi.rf.gd/polevegeduvoxer.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_9653fdfc6a004119a2d6a251e5e437ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/mefatex.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_b27e8b70553a4f728b13801583ab90d4.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_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 5424 bytes
SHA-256: f7c5a81ef813bd78f82d44401f6a7d4d2fd69aed963b896feed9522576d476ee
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 11176 bytes
SHA-256: c53c026e64d393df54f327e65cb56d6d7f28661e4f94d7471058695c6d44d6f3

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