Malicious PDF — malware analysis report

Static analysis result for SHA-256 5349df0f82dd5be6…

MALICIOUS

PDF

80.0 KB Created: 2021-02-12 16:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bae366d6380610352a944e68e59c065e SHA-1: 05effbce8688c11e57929ed42d0f30160b789d37 SHA-256: 5349df0f82dd5be68cfd9d1e0a92e7cb79e22a64e7f1dfa444d141f1fa1288e4
134 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing attempt. It contains numerous links to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a watch winder manual, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/123?utm_term=versa+watch+winder+manual+g077 PDF link annotation
    • http://nazhivy.net/848121266843dvp2.pdfIn PDF document text
    • http://kernig.online/excel_bedingte_formatierung_3_farben_formelcsgag.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/bhojpuri_dj_song_2019_free.pdfIn PDF document text
    • http://cheapkeys.site/88346139439ivasl.pdfIn PDF document text
    • http://momentshop.space/bootstrap_css_login_templates_freekk426.pdfIn PDF document text
    • http://profaudit32.ru/bonexixayfod9.pdfIn PDF document text
    • http://mademupo.22web.org/chiari_malformation_after_surgery_complications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_600aaac76011a.pdfIn PDF document text
    • http://maykistore.ru/usha_ultraflow_150dthah.pdfIn PDF document text
    • http://boost-store.net/first_air_hockey_tournament_2020tfrwn.pdfIn PDF document text
    • http://natiral.space/into_the_woods_scorezgp6e.pdfIn PDF document text
    • http://reflectionss.space/14788363255vx8c1.pdfIn PDF document text
    • http://svoylend.xyz/live_porn_siteskwwkk.pdfIn PDF document text
    • http://info-pages.ru/842130270002cd11.pdfIn PDF document text
    • http://idealica-ufficiale.site/veda_mantras_telugu_freexwx2q.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/valuation_se_dplacer_au_quotidienx1ksw.pdfIn PDF document text
    • http://berkeciftci.net/62939664133j4n5.pdfIn PDF document text
    • http://airet.space/kapijewigekilijutnbh.pdfIn PDF document text
    • http://detonic-official.website/script_rehearser_onlinedpg3w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronikazimasusi.rf.gd/gijadup.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_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 5632 bytes
SHA-256: a4885b1ab2646846f645eb3d548c2962b86479b6591fb3403147e3f60e6d1e68
font_01_sfnt_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 14628 bytes
SHA-256: ed5b5e64ab61556cc731a3c9c8061e11e2b35200d17f1dfa6159cf2a01797516

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