Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a8625c13c0f0c9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 00:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed19839ec634849d52533df668d278bf SHA-1: eac6834a666a80d6bf45a9ab06aeae0feec9f601 SHA-256: 46a8625c13c0f0c9b52e5f2a4835481394cb6e2abfa9d5d533a3644055a3f7d2
134 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=ielts+general+training+reading+answer+sheet+pdf
    • https://cdn.sqhk.co/barugogip/gg3B7z7/26448206024.pdf
    • https://cdn.sqhk.co/rovifatira/jihMXie/food_wars_season_6.pdf
    • http://vevaxogejaz.scienceontheweb.net/jesogomefozazakigololaxa.pdf
    • http://true-board1.club/fairy_tales_in_english_new_stories_20195nngv.pdf
    • http://romeoplanet.club/gukedekikatuxirufivoxa7gs6d.pdf
    • https://static.s123-cdn-static.com/uploads/4414691/normal_60088953f22b7.pdf
    • http://ravovenovibu.medianewsonline.com/cema_belt_conveyors_for_bulk_materials_7th_edition.pdf
    • http://lezobul.medianewsonline.com/43618795079.pdf
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5fd32e75e28c4.pdf
    • http://dunodipike.sportsontheweb.net/nogalu.pdf
    • http://osmosiotzs.fun/aavin_milk_manufacturing_processbjnbz.pdf
    • https://cdn-cms.f-static.net/uploads/4468836/normal_602f9639de7fe.pdf
    • https://cdn.sqhk.co/letaziseb/hhhiahh/video_maker_free_download_with_music.pdf
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fc86b449abf0.pdf
    • http://midikakuvekume.mywebcommunity.org/madame_butterfly_restaurant_savannah_ga.pdf
    • https://cdn.sqhk.co/kuzezajolu/NHkgchj/red_and_blue_states_map_with_names.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ed955c9-a57e-4515-a208-0103482d90a2/petab.pdf
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_6231adaa53744a148062be5361fcb595.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a250912f-4d88-4b11-934f-9cb8a11cdbc2/vakowazogezizujuzasi.pdf
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_dd1d23dbf4b64aef9bd5e90a063fbf16.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d81d25d4-2bfa-46a4-8f3d-81c49d49da11/bilipazerodisi.pdf
    • https://uploads.strikinglycdn.com/files/fe6087ea-b25b-4e61-98b7-91d73056aad3/toro_personal_pace_mower_cable.pdf
    • https://uploads.strikinglycdn.com/files/8ae6ecb1-f949-44be-9f17-208d10e64f73/75891440050.pdf
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_08e22d9486e440dc82a1b6d60f29d0e5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1dd.bin
f10d2574a1f7d16e7494fae179ab7078ae6506eecb78fd06b58adc7653bf19ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 5332 bytes
font_01_sfnt_off0001040c.bin
877989c8d7be58f814cda5411040a6356203edac383f26c3c78710692cd3b9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 10612 bytes

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