Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ffb9366ae29fc2…

MALICIOUS

PDF

71.1 KB Created: 2021-03-30 09:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 272120ed27bfd1bb7a34ae230e9202d5 SHA-1: e1cc775180db7c8a32b44e8bc91afc51e63441bf SHA-256: f3ffb9366ae29fc2a1e9c6a8d2ed22c8ceb476c7638136fa6b93ae922336d8df
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body contains a search query that redirects to a suspicious URL, indicating a phishing or malware distribution attempt. The presence of numerous external URIs and link farm characteristics further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=are+xbox+360+wireless+controller+compatible+with+xbox+one+skyrim PDF link annotation
    • http://naxuvazexipok.sportsontheweb.net/gumuzulenowizedeteler.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/gbzjOyt/linoxuwizemizoxufewavus.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/pan_african_parliament.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/hKigegg/best_mp3_player_for_android_tv.pdfIn PDF document text
    • http://mamuxorap.getenjoyment.net/zavoma.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/bafejabifoxirapepijekopuz.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • http://warofonatar.iblogger.org/holding_hands_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famereraba.epizy.com/poetry_comprehension_worksheets_for_1st_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236f75cd-ce08-4c1b-8ca6-2d31600ee02f/95017761019.pdfIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_0ffc5d53de344389b6b68b94956f8dc6.pdf?index=trueIn PDF document text
    • http://lofupiwosilabo.epizy.com/85400528590.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_e69606ff76b44c079d8e4301bbfcee91.pdf?index=trueIn PDF document text
    • http://mutodavop.rf.gd/63800374039.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/gibiliza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e2dbd5-69a2-4159-8f65-744a9b51ddda/plantar_fasciitis_stretching_exercises_videos.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_off0000d411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD411 6088 bytes
SHA-256: 70fba68435fa7378e39a8bf44b30d55fc2c3ff03c98b4a49a4bf5b58aa99bc22
font_01_sfnt_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 11240 bytes
SHA-256: 695d704fc0d6a04f96b7cb262cd027b0908dc8a362f4a776fbc53b339c6671cd

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