Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e06eaece15838bf…

MALICIOUS

PDF

74.6 KB Created: 2021-03-05 21:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 408f31aa16a999357be4211ac6030ec9 SHA-1: 22254feccc8b1a2ee30426cb49d83e1b45ff93f8 SHA-256: 4e06eaece15838bfd67f7bcfecdd7ba1c00d02ba8c9a14179b58fe0712cf47da
66 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically pointing to 'fokemale.ru' and a keyword suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple distinct hosts and links indicates a link farm, often used to obscure malicious destinations. While no scripts were extracted, the overall structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://fokemale.ru/wix?keyword=senior+economics+budget+project+prezi
    • https://cdn.sqhk.co/geruvijiwiw/bs8LRZp/swing_shift_hours_police.pdf
    • https://cdn.sqhk.co/vibefoparo/cijiaPB/20917232031.pdf
    • http://fazejajogavu.medianewsonline.com/83339095482.pdf
    • https://cdn.sqhk.co/wagejino/ghiidjj/zuduwazotesipuk.pdf
    • http://sadogiropi.mypressonline.com/betuwukodegam.pdf
    • http://finonit.mypressonline.com/how_much_do_interior_designer_make_a_year.pdf
    • https://cdn.sqhk.co/fagojefavap/ciipjhy/nasa_space_life_sciences_training_program.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vonubopoz.rf.gd/google_documents_invoice_template.pdf
    • http://puwovejivu.rf.gd/17796048654.pdf
    • http://laxukumelukadut.myartsonline.com/bipijowekiweloru.pdf
    • https://s3.amazonaws.com/jedaxopopuko/indian_flag_full_hd_wallpaper_1080p.pdf
    • https://s3.amazonaws.com/takebemanijewok/escherichia_coli_2018.pdf
    • http://nuxizutize.rf.gd/associated_with_the_social_contract_theory_of_government.pdf
    • https://s3.amazonaws.com/muvazi/43981097184.pdf
    • https://s3.amazonaws.com/widiku/epic_7_reddit_guide.pdf
    • http://duwujedop.rf.gd/60711028607.pdf
    • http://nonulalomijowo.epizy.com/hackerrank_javascript_questions_and_answers.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_off0000e63e.bin
8aef3a4dbd5c69f96d38e9b7294e5c6c8fb060a52aa1c2a6d21f936112aaf226
pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 5520 bytes
font_01_sfnt_off0000f8f7.bin
731ac1f69ec9d80324a5239775f93b05af57ecff40514b8680ab46f9803e029c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F7 10684 bytes