Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad595e9d12a57be2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 00:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3099236682f9b14a058c87809081b00a SHA-1: 273f0731b0be16b92ae603a7848db09eab8f37cd SHA-256: ad595e9d12a57be2f2d35c2e850bf274fa30e0b011cd4206cb827e164464221f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it functions as a lure to download further malicious content. The presence of a 'download button' heuristic further supports the phishing or scam-like nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://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_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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