Malicious PDF — malware analysis report

Static analysis result for SHA-256 122662512a077ae4…

MALICIOUS

PDF

93.5 KB Created: 2021-02-17 18:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b58375a79971d0984d6e8b4de78ed944 SHA-1: 7f143169e1782841b3ea11735199a975ff5bb65f SHA-256: 122662512a077ae4a3628a725ae56856edc195506c07d644a43336fd8ba2d5ce
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links to potentially malicious or SEO-manipulated content. The presence of embedded URLs and the structure suggest it's designed to redirect users to other sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=did+prophet+see+allah PDF link annotation
    • http://liketime.fun/penn_330_gti_specseut40.pdfIn PDF document text
    • http://likelid.xyz/defiant_electronic_deadbolt_manual4pbeh.pdfIn PDF document text
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/lelibanemaz_xitaxedika_nugekiwe_lemuxezazi.pdfIn PDF document text
    • http://adyga.site/principe_mecanico_epubqt9eg.pdfIn PDF document text
    • https://tesafugefiwa.weebly.com/uploads/1/3/5/3/135318727/zopagodeva-gajupamutojuxem.pdfIn PDF document text
    • https://vapomawuwe.weebly.com/uploads/1/3/1/3/131398268/2060293.pdfIn PDF document text
    • http://bathforlegs.xyz/flight_simulator_online_mobilemohku.pdfIn PDF document text
    • https://gerogebu.weebly.com/uploads/1/3/1/6/131637886/welovewedo.pdfIn PDF document text
    • http://meinekarten.best/sonny_liston_song3mxwv.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/9073924.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/23b497f72bfb.pdfIn PDF document text
    • http://8bitbeardsco.com/hedwig_s_theme_viola_sheet_music_free0qu3p.pdfIn PDF document text
    • http://fuckfrsky.com/reading_comprehension_activities_a29lmco.pdfIn PDF document text
    • http://runmasten.online/wobozavebazawevojigikykskp.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/f74ee0ca91c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/kilometer_log_book_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/project_evaluation_report_template_doc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 5044 bytes
SHA-256: 2fa3abf328a7b24985c5d4c4c7be8ca83c87973ac350a8dff7eddb4651636d4d
font_01_sfnt_off00012c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C36 10916 bytes
SHA-256: e97a1e7424b25f06d15df0c5ad98b20f47143180d56bb18d2a1082b7cf30f6e8
font_02_sfnt_off0001519e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519E 16744 bytes
SHA-256: f88f2c04e714353091dd1359affd9a638c7b65a8d9bdb364c45bf2e584eb0f58

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