Malicious PDF — malware analysis report

Static analysis result for SHA-256 515424b5ea88717d…

MALICIOUS

PDF

73.4 KB Created: 2021-03-08 03:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958503b60b82da0d6ab214df11b6b735 SHA-1: 0c454efe54156f4c523cc41df8d5c3a90259b764 SHA-256: 515424b5ea88717ded6ed0509df6d9463355b4c7cb878e9a223e04a01413d87d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior, indicating the document's purpose is to act as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/aws?utm_term=cub+cadet+lt1050+problems
    • http://bioforce-co.site/free_tv_guide_uk1s2sm.pdf
    • http://trylait.pro/radio_spot_script_templatearm07.pdf
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fc8628936d84.pdf
    • https://static.s123-cdn-static.com/uploads/4376852/normal_5ffbd2ab3f088.pdf
    • http://nomenowunesazoz.scienceontheweb.net/two_step_inequality_word_problems_worksheet.pdf
    • http://muzibatixabu.mypressonline.com/fuxixinuxas.pdf
    • https://static.s123-cdn-static.com/uploads/4486192/normal_6005de02e4572.pdf
    • https://cdn.sqhk.co/zunesunatiri/jEiebcP/xuvawak.pdf
    • http://nitanupemil.mygamesonline.org/how_to_bend_pipe_offsets.pdf
    • http://dikoxikikalonib.scienceontheweb.net/83431653551.pdf
    • https://cdn.sqhk.co/nuroteditu/jhggngj/hope_for_paws_new_videos_2020.pdf
    • http://easterthjg.com/375355828163dmzi.pdf
    • http://vipimuxatomefi.medianewsonline.com/criminology_the_core_7th_edition_citation.pdf
    • https://cdn-cms.f-static.net/uploads/4462730/normal_5fe78b683cda9.pdf
    • https://cdn.sqhk.co/junikesiza/iggeOji/57359290131.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://buzanuziti.myartsonline.com/what_are_the_levels_of_army_leadership.pdf
    • http://redifigikutusoj.myartsonline.com/wisekumeb.pdf
    • 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_off0000e373.bin
9a0c101cffdfa59b6155617a5d21a2c106d469ad416b03bc2f3c3dfcd35aad8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE373 5580 bytes
font_01_sfnt_off0000f64e.bin
e59b61e7078e0fd6bb86d45f3ae0514300c940e01a52c8e984b71dce7c25a1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 10092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.