Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c2d6f326040b57…

MALICIOUS

PDF

78.1 KB Created: 2021-03-23 05:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9dcd2d2d2049789f9b0d57e2a2944c4f SHA-1: eeb74a7bb6b3df79d87fb55ce4727c5b39631765 SHA-256: 01c2d6f326040b578825958c449aa45a3dfac77c644a79226a3d471760179c96
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=bhojpuri+song+video++mp4+new PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5fe7779f24d7a.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/hfifiey/zovof.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/BKgigd2/best_rated_tv_series_2020_imdb.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/nuwikex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_601db69c01b49.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/hdsTvje/dragon_city_gems_hack_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_60590073c4db6.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/fWQcCig/president_speech_today_live_enca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_6051e963151dd.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/did_the_wolf_of_wall_street_boat_sank.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/ajiqhjL/world_best_mobile_games_free_download.pdfIn PDF document text
    • http://nunopasatipimav.medianewsonline.com/que_se_necesita_para_ser_un_lider_positivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_6041f822c56ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabevax.myartsonline.com/que_es_agrobacterium_tumefaciens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64b1187-fe99-44bc-b58c-efd76b9fbf22/no_fear_shakespeare_midsummer_nights_dream_act_2_scene_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d3d7c4-f236-4fc7-a5f9-da2d8016f20d/pisovasonixolexij.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_37f195043f2f4055a640359044cd13d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6633cde6-dd59-454f-bc9a-be18a693c8e2/willy_wonka_and_the_chocolate_factory_credits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3451bd96-5c96-4106-9eac-164d926a210d/kiwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97784ba3-af14-4052-bdfc-db214fd43496/kisozaselulugonarasobekud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9bdfbd-18e0-4667-bf23-525f061392ff/22420240423.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_02757bdb90f742e691c88d0478f9806a.pdf?index=trueIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_382e2957392e409daf933e114fcac259.pdf?index=trueIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_107183ffb02945fa99f639b7618fe63f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5872960-f8e3-41dd-98c9-f49470fe5554/2996195183.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/autocad_2020_shortcut_keys_for_commands.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_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 5496 bytes
SHA-256: 2ba0853c6779bc88e97d4e4666c4d45f87aa0f1327880d8977cc50f1848e57f0
font_01_sfnt_off00010336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10336 11716 bytes
SHA-256: ea31043c9f78c8ec8610c2d3c65fee102cbd4af8154ba115ae10113f476bab2c