Malicious PDF — malware analysis report

Static analysis result for SHA-256 7667978557d840e3…

MALICIOUS

PDF

73.7 KB Created: 2021-02-26 21:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4236c779602935852e59607d7ab1595a SHA-1: fbe6bbfc7fe96807a0e214dc15682ccb86684844 SHA-256: 7667978557d840e34114ee8732d12d8fc1791798f71184fcd05580cee7396e0f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm used for malware distribution or phishing. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

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://soxebez.ru/wix?keyword=flounder+gigging+lights+for+wading PDF link annotation
    • http://ritual-venki.online/jevomdq4o9.pdfIn PDF document text
    • http://topvideo.design/family_farm_seaside_game_walkthrough99u37.pdfIn PDF document text
    • http://kataeta.club/bekononikobupajexufav2ztk.pdfIn PDF document text
    • https://cdn.sqhk.co/fexivijemozu/WlcFlic/dead_trigger_zombie_killer_cider.pdfIn PDF document text
    • http://tomesopinobiz.iblogger.org/86393102311.pdfIn PDF document text
    • http://3203epworthcres.com/18370588185os5wx.pdfIn PDF document text
    • http://volazanuva.22web.org/6853541904.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/e8jjjjO/vefepufona.pdfIn PDF document text
    • http://pixxel.life/884873856827quio.pdfIn PDF document text
    • http://keep-travel.com/23384900921oi02u.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/Wojh5ia/guvus.pdfIn PDF document text
    • http://stebsmeh.space/780412657307ka9g.pdfIn PDF document text
    • http://alcexpress1.xyz/movie_district_13_ultimatumqqyse.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/ejhhbyY/police_officer_costume.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuwitide/COwTlhe/76899307463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kinapemib.rf.gd/33906768963.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_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 5216 bytes
SHA-256: 2007417320a905cfe1ee9d72afb5293d435157537d802d7a5cca3f6566c8f40a
font_01_sfnt_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 10684 bytes
SHA-256: bbee46068835754d6f7f401c99ce0d694fef40bf86a650dbf45efb1734eb522c

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