Malicious PDF — malware analysis report

Static analysis result for SHA-256 3324d4ee0ec7b323…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 06:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 01dbbc6b4c07d0d6c26e657a87de5c12 SHA-1: ee2aa6c6ded1a520ca21aa6ec6ad79f22de18474 SHA-256: 3324d4ee0ec7b323b31efe27c1da5d7999aa98ccdb72af272fb848c5baa2019d
126 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, with a primary one pointing to 'dugedepap.ru' which is flagged as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://dugedepap.ru/strik?utm_term=schlage+connect+smart+deadbolt+replacement+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498868/normal_6014ba6caf8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5fd2cf61cca87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_601263642d4e2.pdfIn PDF document text
    • http://nebo-baikala.ru/aiesec_delhi_full_formby7g9.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/adaptive_control_astrom_wittenmark.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_5ff524e357bdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451575/normal_5ffc649ebd5ab.pdfIn PDF document text
    • http://flylovel.com/92461407090zs0x3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_60552e98b7662.pdfIn PDF document text
    • http://pubguckazan.com/shatter_me_series_summarykpbn8.pdfIn PDF document text
    • http://kayikciakademi.com/fast_food_cooking_restaurants_listxa1o3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_60103d12e8b56.pdfIn PDF document text
    • http://lestyprin.online/52728163623wbbwh.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/setigafat/size_of_tsa_approved_liquids_bag.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/autor_de_la_poesia_mexico_creo_en_ti.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/94640812419.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/how_to_rap_clear.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/image_asset_studio.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/bedelizekifuxo.pdfIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/which_is_the_best_roku_to_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/formation_biodiversit_urbaine.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_off0000e703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 5728 bytes
SHA-256: eb63523c5caf8260a66fafb63864d3d88669f0162f0cc67ac8c93c81fa30f404
font_01_sfnt_off0000fa55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA55 10544 bytes
SHA-256: d47cfa0509730c3cf0c54e84436c5037cfee7c2d3506da827c5c526ca6a069a5

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