Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8fc2296abc30c9…

MALICIOUS

PDF

78.6 KB Created: 2021-01-11 11:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ff33bbdbd1d9a2a18074cc5634609c9f SHA-1: 7122e0a697b8742763e3222073a653ceb8cc3cce SHA-256: 4a8fc2296abc30c982fffbeca96c61252ae66d667edaff0e5ccde903d1467347
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure at `https://traffine.ru/aws?utm_term=t%25C3%25A9l%25C3%25A9charger+andromaque+pdf`. The document's structure and link farm characteristics suggest a phishing or scam attempt designed to redirect users to potentially harmful websites. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=t%25C3%25A9l%25C3%25A9charger+andromaque+pdf In PDF document text
    • https://cdn.sqhk.co/zodenizekija/jgh3gfI/25838463456.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/kamuzawaweliviw_kelafilavob_jupiwig.pdfIn PDF document text
    • https://site-1177603.mozfiles.com/files/1177603/neon_snake_print_top.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8d853476b4c.pdfIn PDF document text
    • https://site-1171899.mozfiles.com/files/1171899/guess_the_song_quizzes.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/geugiaF/tuwiximuwimesopedolefo.pdfIn PDF document text
    • https://site-1177421.mozfiles.com/files/1177421/5477962264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454182/normal_5fdda0608ab92.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/buwedogav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482020/normal_5ff12cae8a295.pdfIn PDF document text
    • https://site-1177929.mozfiles.com/files/1177929/oscar_fish_movie_characters.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/mijedusovineti/pengertian_adsorpsi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/tafiz.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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 5608 bytes
SHA-256: c53b81e34d4b5d7dcf68da0e4b242aac7f94b7578bb69605bbfdcea1fcf99b2e
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 12388 bytes
SHA-256: 9e174b91353936c4efd93503c9756b349ca8510b647c4e8831d3fdb91f2a0069

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