Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41927f3cfaf3435…

MALICIOUS

PDF

86.4 KB Created: 2021-03-14 18:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 0f0e3a399477451f49edbea2c86b3e0f SHA-1: c794fad39caeb01c684367d49a67dee18d8a9407 SHA-256: b41927f3cfaf3435c946a938fe223399ee44f931193b5a3db7f082a2c5c5aeb4
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various external URLs that are disguised as legitimate downloads. The presence of numerous links on disposable hosting and the ML classifier's high confidence score indicate a malicious intent to deceive users. The document's structure and the embedded URLs suggest it is part of a phishing or scam campaign, likely attempting to distribute further malware or lead users to fraudulent content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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/award?keyword=allahabad+high+court+aro+syllabus+2020+pdf+download PDF link annotation
    • https://cdn.sqhk.co/nidimejuzu/hpHfVIl/call_of_duty_warzone_for_xbox_360.pdfIn PDF document text
    • https://kabenodetaxixum.weebly.com/uploads/1/3/4/7/134754863/gukadoteraj.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/Ajgiaij/nadalerizupo.pdfIn PDF document text
    • https://rizizisexulap.weebly.com/uploads/1/3/1/4/131407181/dalawowulasowemexi.pdfIn PDF document text
    • https://sibabaku.weebly.com/uploads/1/3/0/7/130739132/2048243.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/hjhijbi/93522889963.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/8465eaa44.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/simojotu-renuwebov-sozugom-siwodubu.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/jbhghjd/29655921787.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hajLpjj/fly_racing_mountain_bike_helmet.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/naxoxo_kofox_tewukodogajil_xilabanazi.pdfIn PDF document text
    • https://jusatupu.weebly.com/uploads/1/3/4/6/134652681/886514.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/dijiwaj-nunevenexup-godutuva.pdfIn PDF document text
    • https://cdn.sqhk.co/gutevazito/fOgigec/guided_body_scan_meditation.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/MEiaEid/didier_farms_facebook.pdfIn PDF document text
    • https://xurekibovadava.weebly.com/uploads/1/3/0/9/130969225/472874.pdfIn PDF document text
    • https://fusidaxeda.weebly.com/uploads/1/3/1/4/131453850/jirudator.pdfIn PDF document text
    • https://lodufokokafapav.weebly.com/uploads/1/3/5/3/135346761/guxiba.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/fizerixijiwabemipu.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/iicDzaP/idle_ark_built_at_sea_mod_apk_download.pdfIn PDF document text
    • https://fafixujanubaza.weebly.com/uploads/1/3/4/0/134096145/4ebbbe9.pdfIn PDF document text
    • https://nulepapilix.weebly.com/uploads/1/3/5/9/135957677/c8a02add9ba9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/57625006142.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/pufujuxexezevalu.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/michel_de_montaigne_essais_des_cannibales_lecture_analytique.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/definition_of_life_science.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/dugidogorixololivorop.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_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 6012 bytes
SHA-256: 14833e11f8999d512ff3116307daf906f6d2e46897caf248009300a6a152dafe
font_01_sfnt_off0001183a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 10884 bytes
SHA-256: df3ceabf5bf14049e87b4ad22f0c6ce7e7530a343e03e4aee696ecfb96697347
font_02_sfnt_off00013d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8B 3516 bytes
SHA-256: 9b5afa7a85547e2f789c5d7e005531a84b22f02bd9ed69dd8740422940708035

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