Malicious PDF — malware analysis report

Static analysis result for SHA-256 747fed249704c38e…

MALICIOUS

PDF

69.6 KB Created: 2021-06-13 17:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b503fc9d6d677740af96f87924a67b54 SHA-1: a19d431ddbc59393b0c99b2ab6ad134d4635d26c SHA-256: 747fed249704c38ea78141c46383d4af1289e1c95985972d4880e0db15a9427f
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, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/uplcv?utm_term=sona+kitna+sona+mp3+song PDF link annotation
    • https://pima-alarms.net/slicice/file/tigezira.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160949bfd273d7---13312076156.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/6158f0ec741323f35bc964da0e18550d/mavep.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/gikijo.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/da765d467465e7b17577f4a3558cc826/nogakubowedubodep.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f0a3062f4ca2a714481dc2e2cdf9c61a/dojozijegutag.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607872a538e6d---9712459152.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9dd2711d---jixodivesojolesozat.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/dde87b73d4841abf84df21fe9e3db950/nupoputexenadowefi.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857d735a56e---geruzupokapujawo.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3a16122b6---74389786103.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/tururanirokexe.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dujudekipedatawuxoset.pdfIn PDF document text
    • https://biocoils.com/img/file/32143603337.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4eb46d64---16975213930.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/a32620a20a1615abf6ec95b7ce4951f4/tisinivetuj.pdfIn PDF document text
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/51e8fc1fce7896ac90abf142efec927e/fekijilelebutimovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 5340 bytes
SHA-256: 977c91552e27a2c2ab5d5fdc86ab82497644fcb757ddcdd8cb0dcdf4c4c6dd1b
font_01_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 11032 bytes
SHA-256: cd9fbf5579663175652a5b13f4a4b8aeccf514d33d9f9717754fd7570ac591d3