Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd52807844096ee4…

MALICIOUS

PDF

129.2 KB Created: 2021-02-22 07:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e59d984a3127e7ed17c17aa99e0c1ed5 SHA-1: 05fdd80086cd6dc1f3b0d20022f1c50fe74c4080 SHA-256: dd52807844096ee48fe3352235e88ade668663a6e3f9a0cf050f699cc8fba757
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The PDF's structure and embedded URIs suggest an attempt to manipulate search engine results or redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=ffbe+item+world+guide PDF link annotation
    • http://konobemozitu.iblogger.org/free_voting_ballot_template.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/ifNHgji/fly_away_little_birdie_song.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/Riehcgg/zutanazafijiwupot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393776/normal_60025abb33862.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasokefukolu.epizy.com/biblia_takatifu_kiswahili_free.pdfIn PDF document text
    • http://rebobimakefeli.epizy.com/wamaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/nature_computer_wallpaper_desktop_background_free.pdfIn PDF document text
    • http://jixabedumusuzet.rf.gd/darren_hardy_heros_journey_book.pdfIn PDF document text
    • http://gafevudivexer.rf.gd/manna_dey_hit_bengali_song.pdfIn PDF document text
    • http://nokizotef.rf.gd/zizisumafopatokug.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/whole_foods_california_quinoa_salad_nutritional_information.pdfIn PDF document text
    • http://tafisom.epizy.com/anime_battle_2._2.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/tisedifigozaw.pdfIn PDF document text
    • http://pufupivati.epizy.com/macos_catalina_public_beta_4.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/64194340475.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/follow_up_after_interview_no_response_template.pdfIn PDF document text
    • http://sebubexegan.rf.gd/22970920704.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A497 5028 bytes
SHA-256: e0aaecc0e82628b4092524e60e545590c17d92dd1690a991f038c0dc848130a8
font_01_sfnt_off0001b5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5B3 14280 bytes
SHA-256: 5fb2188e08021653dc0cde2f066828e1422803d7dd179d6cfa680fec406bfc7d
font_02_sfnt_off0001e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1F6 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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