Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e72a989737e469…

MALICIOUS

PDF

104.9 KB Created: 2021-06-12 05:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8e597901922327d4401f9fae155fd33c SHA-1: e4335a2ab21494bf70a09dd7a91531a3b921ece3 SHA-256: 66e72a989737e4699cb75865ed9f61e6381baf64a031c25ab3b161f2db8de94a
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which are on disposable hosting, suggesting a link farm or phishing operation. One of the primary URLs, 'https://huntic.ru/pbw?utm_term=female+war+a+nasty+deal+death+in+desert+full+movie', appears to be a lure for a movie, likely to direct users to malicious content. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://huntic.ru/pbw?utm_term=female+war+a+nasty+deal+death+in+desert+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416665/normal_603a55f917243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_605231de26387.pdfIn PDF document text
    • https://bevalulage.weebly.com/uploads/1/3/4/9/134902231/975a5591ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fe0bd037c1da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5feafb7037f01.pdfIn PDF document text
    • https://besumexuzeju.weebly.com/uploads/1/3/4/6/134646316/977604a0c90a.pdfIn PDF document text
    • https://zexamaginususu.weebly.com/uploads/1/3/4/6/134686515/ba5776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_5fe6c4c6db729.pdfIn PDF document text
    • https://rodugetimevo.weebly.com/uploads/1/3/1/4/131407281/d54f42df.pdfIn PDF document text
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/tibepitoj_jovubek_delopofum_wojipakuxun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bf6818-4d01-412c-b669-508833e8abd3/kenmore_elite_washer_error_codes_ue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2eb6ee-bf66-44af-a160-fea0e8a326c7/champion_trap_wheelybird_2.0_auto_feed_with_remote.pdfIn PDF document text
    • http://tavaretaz.pbworks.com/w/file/fetch/144748437/74079715341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d3c401-8ff2-4095-9a71-7382348899e3/jevezarugibuzorope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23343c1e-36ac-4b9d-ab1f-ca9befab5bc7/hymes_speaking_modelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f2b69a-f5ef-43d0-abfe-08c7bc91510c/the_game_plan_movie_dailymotion.pdfIn PDF document text
    • http://suniger.pbworks.com/f/76433958104.pdfIn PDF document text
    • http://patuwit.pbworks.com/f/pepidedufuxasalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb29086-d9be-4b09-893e-c890a4244df8/tasukejifuzugopep.pdfIn PDF document text
    • http://fafevupu.pbworks.com/f/camping_merit_badge_prerequisites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e45e70b-b71e-48bd-8013-96ac3e73b385/surizud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a08e032-7535-4404-87bc-26a563362d06/a_court_of_mist_and_fury_rhysand_nightmare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf51343-3e20-4e85-94b6-1cbdfb67033e/how_to_write_8_hundredths_as_a_decimal.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD2 4236 bytes
SHA-256: 496891a856484daad022d6c2e53ce3495c8b9229c3e485d1ba863653ea0a30e7
font_01_sfnt_off00015ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE0 5356 bytes
SHA-256: 68dc22d0c8151a0617563e250cce0e0d09ea1cb4bff1b5f437537f8a8083b373
font_02_sfnt_off00016d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D02 11476 bytes
SHA-256: 64fc4e9edd76992c702e8ebce31f81972861e3c72bd9efa3353fdce6d9218d7d

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