Malicious PDF — malware analysis report

Static analysis result for SHA-256 995d57d5216026c9…

MALICIOUS

PDF

75.0 KB Created: 2021-03-14 09:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7908e45d888b67acd0cb6c68462a63a3 SHA-1: b1c5b77236a8bc485533379385d244ff6a9f698f SHA-256: 995d57d5216026c9200a7b3d67d10bf3545817b4c9583fdee955b98f33f95d94
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm for SEO purposes. The primary malicious URL, https://pelibifir.ru/123?utm_term=play+tamil+movies++hd+2019, suggests a lure to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/123?utm_term=play+tamil+movies++hd+2019
    • http://lovefoxesi.iblogger.org/summary_financial_statements_audit_report.pdf
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/81475f991.pdf
    • http://milanomoda-italy.site/retroarch_delete_cores_androida9ls9.pdf
    • https://gatakuluva.weebly.com/uploads/1/3/1/8/131856326/7155274.pdf
    • http://subbellassecret.com/schwinn_airdyne_ad2_redditnldc8.pdf
    • http://usejus.club/ignition_temperature_definitione5jrs.pdf
    • http://katorewudejizut.22web.org/punopaviwuramijetileb.pdf
    • http://azorocheat6.xyz/pathfinder_kingmaker_octavia_romancejscru.pdf
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/xapididek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7500860f-aa12-464e-8131-6c25970ab273/32450411309.pdf
    • https://uploads.strikinglycdn.com/files/634bdae2-d9b7-46ea-9aad-09408779409b/86446748540.pdf
    • http://difugarulid.epizy.com/protein_synthesis_ppt.pdf
    • https://uploads.strikinglycdn.com/files/4640971f-290b-450e-ab29-35463de6f69d/ravakan.pdf
    • http://jimomug.rf.gd/bodatagukokivebikewemudu.pdf
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_5719688548124728807fb5e78084663a.pdf?index=true
    • http://menikax.epizy.com/vedic_astrology_reading_uk.pdf
    • http://runesufosufej.rf.gd/microsoft_word_thank_you_card_template_blank.pdf
    • https://uploads.strikinglycdn.com/files/10884a8e-1cec-4c24-8d53-239df44173c6/hp_envy_4500_not_printing_properly.pdf
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_8a9b83d2716c4e889784dfe8b2d5d8d4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d974646d-8b3b-45ce-9da2-c7fcb3f9aaa5/virapojozategubowagiwilep.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_off0000e57d.bin
4989152a7c0bceac203f3a1b4bcd713b7d7ddbd6b691d1bb030d23fb24a0677f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE57D 5616 bytes
font_01_sfnt_off0000f87b.bin
a8cfba9c39f9e4a2c20dc711e5d91bd7813e28ce9837c501909d4a2ba23ad3f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 11492 bytes

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