Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53bea663c93d89a…

MALICIOUS

PDF

74.3 KB Created: 2021-04-07 07:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fcca39aea47672d5e73562312d8bcd0 SHA-1: 95b498ea7ebf7d47465bf2c823833b84438792aa SHA-256: c53bea663c93d89a623b110dfffe8279da9d21cdaac678d887bc30287047900d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://jumiwimov.ru/123?utm_term=degraded+mode+performance+optimization PDF link annotation
    • http://nedivebepize.iblogger.org/list_of_alloys_and_their_composition_and_uses.pdfIn PDF document text
    • http://dematovaxitak.22web.org/senavonavotanegejuxitipe.pdfIn PDF document text
    • http://mkuu.club/890013778243tiwn.pdfIn PDF document text
    • http://creditstar-kabinet.com/how_to_clean_resmed_airsense_10_heated_tubingjldlc.pdfIn PDF document text
    • http://emmetrix.net/puzafepinufevigobokudifetd0q5e.pdfIn PDF document text
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/wegedogagebu_nifopowib.pdfIn PDF document text
    • https://zabepufi.weebly.com/uploads/1/3/4/6/134681717/461713.pdfIn PDF document text
    • http://helpforteam.com/diferencia_metal_gear_solid_2_substance_vs_sons_of_liberty_cheats3umkw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://julonagakumer.rf.gd/bewejil.pdfIn PDF document text
    • http://sazovenofejeji.rf.gd/peter_drucker_download.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/free_adobe_creative_cloud_photoshop_cc.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_0a0837606a0c4aaa9bdb803bbb81d516.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/zebivokabudepofu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/minecraft_crafting_guide_mod_1._12_2.pdfIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_9a426a020f634330a04fc44c4091b710.pdf?index=trueIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_71a60836879d4bda9a7afda21d673789.pdf?index=trueIn PDF document text
    • http://sawokemapixaf.epizy.com/tupasaba.pdfIn PDF document text
    • http://dibujofas.epizy.com/jowasewegu.pdfIn PDF document text
    • http://tosopipates.epizy.com/sledgehammer_rihanna_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/pathfinder_kingmaker_beneath_the_stolen_lands_level.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/washing_machine_repair_services_in_my_area.pdfIn PDF document text
    • http://vajezozaxapom.rf.gd/51559925533.pdfIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_844497bf22e24b9eaeb9c68938d63fbd.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 5312 bytes
SHA-256: 0974e7c804ec16a21e1d1af99b03a7c759faed28c037906dd85210567ac3a87c
font_01_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 11224 bytes
SHA-256: 9218dc1d0be603e99ebe9d701dd4d59b0aadcd3f75cdf97f6a2059c8cf70f832

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