Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302553440ed3ed9…

MALICIOUS

PDF

98.2 KB Created: 2021-03-03 01:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e0155b6de8d8a88c7b77dce9b7b0997b SHA-1: a70604c0c8391cb1ae2642d772427e33bee7f79e SHA-256: 9302553440ed3ed988bbbad35e2ce7d74bff5923c112168d1a577ea9b32b6fa5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a Julius Caesar play, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/strik?utm_term=what+anachronism+occurs+in+act+3+of+julius+caesar PDF link annotation
    • https://cdn.sqhk.co/rifojimuna/gccihgd/64589467249.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/i0ozpP7/javegutuxodupesuf.pdfIn PDF document text
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/6838476.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/jotubig.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/OYLhjhc/vaxiwijerid.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/gekiv.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/ggjdifN/color_museum_san_francisco_tickets.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/sefabe/html_email_template_generator_free.pdfIn PDF document text
    • http://dotejujuzobok.rf.gd/what_is_the_meaning_of_free_will_offering.pdfIn PDF document text
    • http://lojosikol.epizy.com/wimemujulab.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/cell_organelles_and_their_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/xeravizeviwemi.pdfIn PDF document text
    • http://zenajonefi.epizy.com/what_song_goes_memories_bring_back_memories_bring_back_you_lyrics.pdfIn PDF document text
    • http://bemogabidemixu.epizy.com/wewikisoti.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_off00014530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14530 5376 bytes
SHA-256: 7ea3cd67a483b3cdefe34fd2ebd89c3a2200dd5dffcbfe05dd43db44a0ffb312
font_01_sfnt_off0001575d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1575D 10740 bytes
SHA-256: 1e1f6f5c3b3b27d00b26dab58c42928f7864a724588412f7dd4c27864fe2b80f

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