Malicious PDF — malware analysis report

Static analysis result for SHA-256 110ae74fd812efde…

MALICIOUS

PDF

71.5 KB Created: 2021-03-12 20:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d802c2e4af2770fd1241126da368f215 SHA-1: aa52129230df842535e43eadf68cf8a82f1556bb SHA-256: 110ae74fd812efde055fa7cc1861f3e71deb46e9d0466535d5bc80fb4f5b1a8b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/aws?utm_term=2008+jeep+grand+cherokee+blower+motor+not+working
    • http://itayoga.space/tudokalabexamea845.pdf
    • http://j3vnci4.xyz/normal_delivery_baby_video_freekf6pk.pdf
    • https://cdn-cms.f-static.net/uploads/4488574/normal_5fdc1357ed01c.pdf
    • http://golosa-spasibo.ru/setosenizamqj3ce.pdf
    • http://xijonofupawulo.mypressonline.com/what_is_the_job_duties_of_a_medical_laboratory_technician.pdf
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fca78579068e.pdf
    • http://xexulijupofa.iblogger.org/minecraft_free_pc_tlauncher.pdf
    • http://xovijezup.mywebcommunity.org/55391789009.pdf
    • http://fruit-ita.fun/computer_networking_a_top-down_approach_6th_edition_solutions_to_review_questions_and_problemssk4f2.pdf
    • http://wexexazemulo.iblogger.org/brand_identity_design_proposal.pdf
    • https://static.s123-cdn-static.com/uploads/4365636/normal_60021b6f3cafb.pdf
    • http://leaninrzpd.site/breadman_plus_tr600_paddlezmqla.pdf
    • http://uscreditreport2021.info/its_not_the_stork_youtube466cl.pdf
    • http://tezibif.mygamesonline.org/56735708766.pdf
    • http://vimobewawulipiz.mypressonline.com/guzojevefavosifimepin.pdf
    • http://hhizmet.com/87314978331cmq4n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pawesew.epizy.com/online_to_word_converter_google.pdf
    • http://vigexosav.myartsonline.com/sujemu.pdf
    • http://fugolosabi.epizy.com/lexowojuvigedaferusatob.pdf
    • http://nidusorigawofe.rf.gd/27234052718.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d803.bin
a0f755d435115bd5cf8ca740c18f17a6d28d8033a14904bf078a1ff282e43c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD803 6052 bytes
font_01_sfnt_off0000ec82.bin
89987819242131019b16cc048c18cf22c900b1282f5d52bbcdd1588428c5076d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 10680 bytes

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