Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0b91b264f489b1…

MALICIOUS

PDF

101.5 KB Created: 2021-03-19 12:04:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 668587e03911779bfbd67a1bb94fecfd SHA-1: 7949891b84239bafc17c49745f1ca556e7f6ca2d SHA-256: 2b0b91b264f489b1788464ff19669af41fd0edddffa92212c1bb5ab40a2e0725
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=shakta+agamas+pdf PDF link annotation
    • http://austritkfa.com/tivulosenumuwasowobojyogg8.pdfIn PDF document text
    • http://belkwigs.com/just_drive_simulator_gameplayov83s.pdfIn PDF document text
    • http://naturaleone.space/defender_24_hour_segment_timer_manualpjyto.pdfIn PDF document text
    • http://omshop.space/548078167503p0qf.pdfIn PDF document text
    • http://yourlivehelp.com/demokuves6l2uv.pdfIn PDF document text
    • http://shopmzm.site/windows_10_display_hotkeyol9pa.pdfIn PDF document text
    • http://christinaanddavid2019.com/native_instruments_s4_mk2_vs_mk3xm7hc.pdfIn PDF document text
    • http://setlyb.online/yamla_pagla_deewana_2_movie_bolly4u2ar6j.pdfIn PDF document text
    • http://iranomics.com/kinobody_superhero_bulking_program_freewelha.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/2872483473375kdb.pdfIn PDF document text
    • http://mif-smeh.space/47248316525xzc1q.pdfIn PDF document text
    • http://fastgetme.online/400901138316221x.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/gOiavia/44720836286.pdfIn PDF document text
    • http://outputqwvk.space/62838517121fjof3.pdfIn PDF document text
    • http://momsmall.space/fejalawec9fn4.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/awGjgge/virus_wars_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/pujimuxuja/7iibjea/finger_guns_meme_blank.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/jg3vjhT/1290_super_duke_tank_pad.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/j0jahbP/management_buyout_offer_letter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa27836-a1b8-42c4-9015-bbd83996275a/58507405420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffe5bab-4661-4591-9484-0fa267ab576b/17700833055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb77bd-9aed-4896-82aa-89c06df28107/best_non_programmable_thermostat_2020.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_off0001441f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441F 5492 bytes
SHA-256: 338177f475db0418e66323dd79e25b01f3e79187f3a70c7ad0db93ad5a17ac28
font_01_sfnt_off000156ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AD 12604 bytes
SHA-256: f2793fa9deb717a33217d9e38c3fadb9cb1b3783d80838e13c1c66a884ffdf9c
font_02_sfnt_off00017d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D96 2688 bytes
SHA-256: e6b141e73ab3b816a4070af5e546c29da6f370ba8e7a611ce096672f24e36818

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