Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac6b63101977dcd…

MALICIOUS

PDF

93.4 KB Created: 2021-04-19 16:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3d1a0fcdd21efbf6f3bfc1bab7ff6392 SHA-1: 260dec46701aef9afb6cf68e2d882ca7d0a0b209 SHA-256: fac6b63101977dcd7dce71925416e950fa292fe54fb87789c8fba11fbe29d9be
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic detections indicating it is a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm heuristic points to the primary attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/strik?utm_term=soundcraft+ui12+hard+reset PDF link annotation
    • http://zonerokemub.getenjoyment.net/jekawedemabumosal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_60341bde573e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_601806c31ae4a.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/68494666963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_602d737e6e972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_605472189442e.pdfIn PDF document text
    • http://kuworekokinig.medianewsonline.com/cable_gland_selection_chart_for_armoured_cable.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/37593986272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_60202d792a263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/052c0ed8-2bb5-4d3f-bfd8-c3d782372ce2/tololotenumunobe.pdfIn PDF document text
    • http://xepuzakudera.atwebpages.com/rogifofaxinokozunenibaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04cc81e-7136-4486-8dcc-112d150d2cde/attack_on_titan_manga_volume_2.pdfIn PDF document text
    • http://digotadegijo.epizy.com/decimal_multiplication_worksheet_with_answers.pdfIn PDF document text
    • http://luvetux.myartsonline.com/paremenusosipomobapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b43e5f5-70df-435c-9a45-1ec8619d7ff4/how_to_prepare_for_wealth_management_interview.pdfIn PDF document text
    • http://xojorefalez.rf.gd/how_to_reply_thank_you_in_corporate_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48b9827-cc56-466f-a09e-45070ba68da0/rumble_fish_chapter_12_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007cb3ba-204e-449a-b8f6-0426c6946e90/what_does_the_phrase_for_the_long_haul_mean.pdfIn PDF document text
    • http://pugatexekar.rf.gd/12194559650.pdfIn PDF document text
    • http://dalitixusukewo.epizy.com/besoguxexogoxizururejid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4976e7-246f-4bbe-9353-d28cfae07218/how_to_use_dyson_vacuum_cleaner_attachments.pdfIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/juvanemerajarovizuvukiwik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24beac71-3d41-472e-9519-a3d6606df8b7/9173351822.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001249e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249E 5364 bytes
SHA-256: c307596125976970d303da4afdf0a07c7f2ce6f28f1e5d24a7d5c9c59cf078ea
font_01_sfnt_off000136d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D6 2076 bytes
SHA-256: 33364e2eef7b6e2c97befa93ec1d37df4c427e6286e034250a5ff06d8b45867b
font_02_sfnt_off00013fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD6 12524 bytes
SHA-256: 22c8a649d19c27afcd2fbe61643e4d17c2b0a80daf65436926abac2c1b3a80c6