Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fd5513343a4542…

MALICIOUS

PDF

73.9 KB Created: 2021-02-14 04:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 290fdab75e706f9cd55afc07344df2e9 SHA-1: a41ca9efe2ab95f0d361eb6da625ada31741d7e7 SHA-256: 04fd5513343a4542237b7f4631db7c63c12fab85d580ef2e3c3b217e6de44e4c
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1539 Steal or Forge Credentials

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a credential harvesting lure. It contains a mass of external links, many pointing to disposable hosting services, suggesting a link farm designed to obscure the ultimate destination. The heuristic 'SE_MFA_LURE' indicates the document likely prompts users for one-time codes or MFA approval, consistent with phishing kits aimed at stealing session tokens or abusing multi-factor authentication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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
  • 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://druttle.ru/wix?keyword=uber+partners+and+driver PDF link annotation
    • https://cdn.sqhk.co/pesuxitum/jYohjjd/73827832070.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/he0iaTy/chebyshev_bandpass_filter_matlab_code.pdfIn PDF document text
    • https://vosewisujar.weebly.com/uploads/1/3/5/3/135398140/a54f26616.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/AifL7Er/easy_homemade_cake_recipes_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/hbSjjgf/party_music_2020_list.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/vDkggaN/mhsaa_football_championships_2019_channel.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/dufopilobelon.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/xiiiagn/rare_pokemon_cards_sword_and_shield_darkness_ablaze.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/liwudijoxurulamik.pdfIn PDF document text
    • https://saditifoba.weebly.com/uploads/1/3/5/3/135325123/givojavonulij.pdfIn PDF document text
    • http://rorezorejadij.iblogger.org/datedigov.pdfIn PDF document text
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/c76eb98366.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/634849.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ic9ghxV/evil_horror_monster_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_60174df5ceccd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 5112 bytes
SHA-256: 76ac2552cdbbe6c32bd2d7c61eebb3b52b8c1d532a8681a72f312fcc9dd09389
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10564 bytes
SHA-256: eb454eedbbaef815f355f26b6ae75cd39311f73439fe9226d66270db470b58c3

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