Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7bee97c28c9632…

MALICIOUS

PDF

142.6 KB Created: 2021-03-18 18:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 407dcee456b19451776830ae350c9fa6 SHA-1: 9124e62b1b0bed261c6e7fdf4f5a7aa55876134d SHA-256: 0d7bee97c28c9632e7c47a330d2607304d805c54bcb3e9a01f00429317079e6e
126 Risk Score

Malware Insights

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

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

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 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://ponafet.ru/123?utm_term=unesco+ka+full+form
    • http://xonigej.mypressonline.com/why_are_my_outdoor_lights_not_working.pdf
    • http://jerimujolegem.medianewsonline.com/econometrics_download.pdf
    • http://pigigozoruda.mypressonline.com/rt_ac68u_default_password.pdf
    • http://xafesuvorolivig.scienceontheweb.net/antimicrobial_susceptibility_testing_disk_diffusion_method.pdf
    • http://dibiwarisogix.mygamesonline.org/savomofipenejerox.pdf
    • http://wowitaly.pro/nzm_hikmet_ksa_iirleriywr7s.pdf
    • http://naturka.space/7967162990485szd.pdf
    • http://ver-alex.website/24157782799fs8c2.pdf
    • http://copyrightreports.com/vivid_seats_event_ticket_insurance5vkd7.pdf
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5feb493b02f74.pdf
    • http://specrazreshenie.com/flightradar24_flight_tracker_apk_freehwoer.pdf
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5fcb3ffe2cfeb.pdf
    • https://cdn-cms.f-static.net/uploads/4378628/normal_601822d73b233.pdf
    • http://pofuxubilet.sportsontheweb.net/bowflex_power_pro_leg_workouts.pdf
    • http://soldatskaya6.ru/xabuketukebakotulanegi1miqp.pdf
    • https://cdn-cms.f-static.net/uploads/4417537/normal_603970676566e.pdf
    • http://ttttrrrr.space/feliz_navidad_sheet_music_pianos95un.pdf
    • https://cdn-cms.f-static.net/uploads/4505358/normal_6050713b0541e.pdf
    • http://vetobiz.sportsontheweb.net/lupexut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zeroxezubanalil.onlinewebshop.net/32559477773.pdf
    • http://tafiwepamubov.atwebpages.com/16015412335.pdf
    • http://nevabaza.atwebpages.com/muvadukujomozodinokid.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_off0001f08f.bin
8b5951cc0938deec28ed4ddff6e1cc82605a1d837ab66474f9a833662954c712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F08F 5084 bytes
font_01_sfnt_off000201d1.bin
57ca22479488b4ea9246e475fbf7f71627060ddb8354ad97da4193d29ced2b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x201D1 14232 bytes

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