Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fe5b046eb7efe5…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 21:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bf21c6d5e018dafb2afc4da5ded792c3 SHA-1: d39cd689c767bc69096c991183de05cde75e5f71 SHA-256: 78fe5b046eb7efe5f8d99e50807d9befa41ed9ed6e2f9f764989bf420ee1c151
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

Heuristics 4

  • 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
  • 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://baarspo.ru/aws?utm_term=are+the+old+gods+dead PDF link annotation
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/vinukowodaz_wugizezaziti_rukilitozi.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/eAjfheG/information_about_kobe_bryant_accident.pdfIn PDF document text
    • http://dommasters.site/strength_training_program_without_weightshfwg5.pdfIn PDF document text
    • http://instapriz365.site/kojonuxilelotisodazotibkjb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fee23fdb5307.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/gcfF0Bo/jipemuvemodifibeweni.pdfIn PDF document text
    • http://alexsaf.ru/kiveligexeteduqbagt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387573/normal_5ffe0a0589a4a.pdfIn PDF document text
    • http://avto-trokot.xyz/bhaktamar_stotra_anuradha_paudwal_songs_free9gegz.pdfIn PDF document text
    • http://hopecommunitynaz.com/antidiabetic_activity_of_aloe_veraibe7s.pdfIn PDF document text
    • http://stnold.com/superstar_life_hackswblhf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_6011540e9b93f.pdfIn PDF document text
    • https://dutizadip.weebly.com/uploads/1/3/4/8/134889078/mosonole-lejeda-tomubilojagovig-pupevudajaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/e1hgNgg/cowboy_bebop_netflix_release.pdfIn PDF document text
    • http://mail-autoscout24.net/route_101_traffic_reportcg4b3.pdfIn PDF document text
    • https://lotuvimipel.weebly.com/uploads/1/3/0/7/130739731/supute.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/fhdaIja/geotourism_meaning_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/eiiicif/anime_paint_by_numbers_online.pdfIn PDF document text
    • http://vvd.bar/plan_de_negocio_de_un_restaurante_vegetarianofaou3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 4708 bytes
SHA-256: 9094c6c01e6fa2cdbdfe1b15eb10b26668d6713b1f8f4096a8908b38801f8304
font_01_sfnt_off0001077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077C 10544 bytes
SHA-256: bcb6b042f2ecf982385cda5c6ed9b9e8749e1c00897c89a7aa547325c961bc28

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