Malicious PDF — malware analysis report

Static analysis result for SHA-256 3948f1c01db882f9…

MALICIOUS

PDF

75.3 KB Created: 2021-02-26 07:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 348bbccfe617bb2d03a99901aedeae47 SHA-1: afa8336b1a50e2523799428e55599ab0be18d0d5 SHA-256: 3948f1c01db882f9668b9c8708b1a2e9ffa2cbcdc27010d525e041d5592ae4f9
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://bologen.ru/aws?utm_term=how+to+treat+sensory+processing+disorder+in+adults PDF link annotation
    • http://specrazreshenie.com/fegeburesafafok3pajd.pdfIn PDF document text
    • http://betmoy54.com/vuxowuzoxanifolemaniydd5b.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/92084955322.pdfIn PDF document text
    • http://robinmani.site/kuwotazegudo366cf.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/a0ismih/95884767823.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/gejeidO/72269925972.pdfIn PDF document text
    • http://blekrossi.ru/what_is_the_healthiest_meal_at_chick_fil_ajvlzn.pdfIn PDF document text
    • http://b4shop.icu/psychology_sensation_and_perception_quiz_answerslbr05.pdfIn PDF document text
    • https://cdn.sqhk.co/fokaladanolo/Bun8gjG/islanders_vs_flyers_schedule.pdfIn PDF document text
    • http://pinegrvuig.fun/51147904823m2iki.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/giMgiOm/79111807034.pdfIn PDF document text
    • http://copyrightsupporteds.com/how_to_wire_comfort_zone_heater8f5fl.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/ATghGek/minecraft_pe_survival_games_server_ip.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/cat_jumping_off_car_memewse5j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/remufuzu/wixabusuvokuwo.pdfIn PDF document text
    • http://bexituxupogetav.rf.gd/how_does_the_ability_to_interpret_the_constitution_limit_presidential.pdfIn PDF document text
    • http://bologipegokofi.epizy.com/tukijutufev.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/gun_carry_permit_pa_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/8575114648.pdfIn PDF document text
    • http://dipibezepipes.rf.gd/alone_picture_girl.pdfIn PDF document text
    • http://venabot.rf.gd/jupaxoro.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/lauderdale_lakes_wisconsin_fishing_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 5396 bytes
SHA-256: 2bcdde6891081030590f9570697d6b6e6a9177f5695407394266d805cfb52863
font_01_sfnt_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 10188 bytes
SHA-256: e43deeb70df0c37c5ff217c3628c2a755f2abd4ac476a4f0a614592310d11378

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