Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fce322d76be5475…

MALICIOUS

PDF

93.1 KB Created: 2021-07-01 16:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 936c7aa6efec6822546d6f7e193efd03 SHA-1: 8b04fea907c2944354f6b33c2a893e380c02dbc1 SHA-256: 6fce322d76be547553cd7c5cda84af84b6343761a9fd96dc75b098f09839e83d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=how+to+stop+xbox+one+controller+from+drifting PDF link annotation
    • https://alakharia.com/public_html/userfiles/file/momafoguburodujezosigato.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/97519709771.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/40b040738e5d3c643fd9bd35232d5410/zetegizom.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/32cbe5c813bda9364fea8acd650bebae/takesipogof.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f9255558224c4a99e6690af26cad816b/rofenisoreseniwuz.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/6tdb705m66vj49q8csej8d3hi7/mobat.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/34875296642.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/dufer.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/lk81n7svab54bukrh5ontjqe91/8060939069.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/31931758380.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/22485979989.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/ec54ff2e0b9e616b141f6838f59e0b8e/38460230964.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/dkedist24v49g2501kfhro9qn9/laguwelafadiditewivib.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/fumasut.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/xipulegeb.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/23227314850.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/50357107497.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160827362614ac---sefapaf.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/ziwok.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/dijezakupimim.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/42470516978.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6354d5ad03---tisupelesoravezo.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://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_off0001078e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 17340 bytes
SHA-256: 983a2625cb3db52841e0130a241fbc492480c0749dd21f7fe606ff077249a75f
font_01_sfnt_off00013528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13528 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3F 11120 bytes
SHA-256: f680ecc13b5ecad2b3e7f785c710e472983b53c7bf364d4de14a8c7bf25eed84

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