Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e04fac78a9b08ce…

MALICIOUS

PDF

71.5 KB Created: 2021-02-28 16:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6e51c4d121dd235ef0564aac7ffd3510 SHA-1: adc1cc61b784044b02fa53244fd8ac5be882d6a7 SHA-256: 1e04fac78a9b08ce0efdb48132e1a34793e53a182d67ea0b742980816c79dc27
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Web Session Cookie T1056.004 Web Browser T1071.001 Web Protocols

The sample is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It impersonates Netflix to trick users into providing credentials, likely for account takeover or session hijacking. The document displays a fake CAPTCHA or MFA lure, consistent with credential phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://koduxiwarutuj.weebly.com/uploads/1/3/2/7/132740502/f2bbe20a2bd8150.pdf.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://druttle.ru/strik?utm_term=d+link+dir+868l+change+password PDF link annotation
    • https://koduxiwarutuj.weebly.com/uploads/1/3/2/7/132740502/f2bbe20a2bd8150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370266/normal_5fec41a18d35d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_602a05c7325ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fd7a6d60dfc3.pdfIn PDF document text
    • https://perikoweb.weebly.com/uploads/1/3/5/2/135297066/pibakubodob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_600e366eeeb4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_603052fd5dc7a.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/kelosopabodapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_601c7e2a3d4ca.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/xutomoxu/ielts_speaking_questions_and_answers_band_8.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/skyrim_se_best_mod_list_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/xekejekadulazolixixerawed.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/android_studio_comment_multiple_lines_shortcut.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/7029729.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_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 5836 bytes
SHA-256: 923272dbeaacd6c01a55aaf509d19b4ff34c0147180ed4b3c4859f5eefc3bda2
font_01_sfnt_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 10536 bytes
SHA-256: d712b6194707cfb293d25c60052dcb673925f6c70eea43e086fc276ec26395c2

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