Malicious PDF — malware analysis report

Static analysis result for SHA-256 3254da18765a0709…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 02:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00761d873795c2e82bac9c4f38518c12 SHA-1: b41fdc7e28da950ce33015832a9c65bafdc13475 SHA-256: 3254da18765a0709ae75666196784d563e3fcc7ca7756036eeb39ec657ead85b
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, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm designed for SEO manipulation. While no scripts were explicitly extracted, the nature of the URLs and the detection as a trojan suggest it likely attempts to redirect the user to a malicious site to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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 http://bettyloustintruckbbq.com/9794419742ljmqt.pdf In PDF document text
    • http://storeeuro.info/what_cards_are_issued_by_metabank0oah2.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/bosugaziro_xegiwamamuvor_vodalukese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_6049d283ca920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fc78b452854e.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/192529.pdfIn PDF document text
    • http://trend-sales.fun/11272180995cc1xq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5fd8860558737.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/c40a3e6a.pdfIn PDF document text
    • http://arboozfilm.com/xomuvegigabobo0gixk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_602df400aed51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490122/normal_600906d5b9da6.pdfIn PDF document text
    • http://online-sistem.site/palaludizn414.pdfIn PDF document text
    • http://blognews.top/design_it_girl_fashion_salon_game_downloadofegy.pdfIn PDF document text
    • http://thesimplycompleteseries.com/58463954368ixx0w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/0IJhScypsXo/wb?keyword=3rd%20grade%20workbooks%20freePDF link annotation
    • https://uploads.strikinglycdn.com/files/f513ba27-cbe4-40ae-9533-33c44022800e/5990087170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a923af75-5ff0-4c1b-a690-229f954cf602/best_art_activities_for_toddlers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478933d2-7e23-4144-87a3-8cd4113752d8/57640498124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5895faa7-9e69-4bb5-88b1-ecd30f827b73/dare_to_prepare_stan_deyo.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_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 5408 bytes
SHA-256: f4c8a81ee45181845aa1b975031eaf46212ab7b6979e44e7f18e27b71855ce2c
font_01_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 11216 bytes
SHA-256: 6e96303c4ba5d26fd01779e37ee56e1ae8e813e68985df3bff6896f69106b6e1

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