Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbf0f9ab41f563f…

MALICIOUS

PDF

81.0 KB Created: 2021-03-12 19:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a0dce4867009a00209096e12990011b4 SHA-1: d8b0e2ae4cd6a79779d57324ff3b3f56e65f0784 SHA-256: 2fbf0f9ab41f563fb2f8cc4d57d6dadc35e57689ee673991d72594636709dbe4
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 external URIs, with one prominent URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'tailoring training guide'. No scripts were extracted, but the presence of multiple disposable hosting links and a link farm heuristic points towards a campaign designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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/123?utm_term=vanilla+wow+tailoring+training+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414489/normal_5fd9cc8e2eb73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5ff903585bf8d.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/40260141629.pdfIn PDF document text
    • http://afracheat4.xyz/oster_smash_blend_300_blender_with_smoothie_cup3zypv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_60383550ed8a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_6004ba2facc55.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/swann_wifi_security_system_reviews.pdfIn PDF document text
    • http://lalashoppen.online/kunumifulivojobn4ecn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_600b919579d1a.pdfIn PDF document text
    • http://nakaxovatixokew.22web.org/56430509519.pdfIn PDF document text
    • http://nasty666.space/propresenter_support_chat02pue.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/thbhHch/redungeon_hack_apk_4._65.pdfIn PDF document text
    • http://ogranicbio.space/download_game_spongebob_moves_in_mod_apkmdjwr.pdfIn PDF document text
    • http://bufizuz.22web.org/bogogusosakaputi.pdfIn PDF document text
    • https://cdn.sqhk.co/fanoxozowupe/RUPhhIt/maps_for_mcpe_1._11.pdfIn PDF document text
    • https://cdn.sqhk.co/gamakokub/ibkgjeC/creepypasta_splendorman_x_reader_lemon.pdfIn PDF document text
    • http://labiosdewonda.com/samyutta_nikaya4v4bf.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/3zmchda/centurylink_outage_pagosa_springs_co.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/vebenok/fudubefowerubadaka.pdfIn PDF document text
    • http://talavapupaniv.rf.gd/what_is_the_distance_around_lake_harriet.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/best_easton_arrows_for_hunting.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/maths_worksheets_year_6_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/acc_aha_guidelines_acute_coronary_syndrome_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/sizewemeliripagebaga.pdfIn PDF document text
    • http://jotigosi.epizy.com/maps_of_the_ninth_world.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_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 4872 bytes
SHA-256: 9afd7edd4731e06836567c8324e0b5bc45ee0ec8f3d53d4ae3a2658cffebff6b
font_01_sfnt_off00010df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF8 12108 bytes
SHA-256: d7934fb759d8ed9b95d5872ce6f5d04ec3a3950d10cf7c83ab176b81cff0142c

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