Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9c15a573739f6c…

MALICIOUS

PDF

85.5 KB Created: 2021-09-07 10:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ce28d23096e1a1b038792d5d250398f9 SHA-1: 20d9bc462126d6b47f738acbf66263b771832ef6 SHA-256: cf9c15a573739f6c6692551ab153e084c2790bb8d3861ee2a7a87be0b105e022
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a technique common in spearphishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://matsonconstruction.net/userfiles/file/55320079154.pdf In PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/4f7801bf6e7e1cdb4f664a4274fddc58/81435939957.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/mevixaneselakipela.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af088afa5e---xalosatulejejosirukokogo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607936617ce0d---53292378962.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ee4054c04fcc17222399c9dd334479cd/71912810437.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/xazazolejolebu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9l6go55ttt32mf90ddbd8eqsjg/2087907072.pdfIn PDF document text
    • https://vijyaiprismcrm.com/userfiles/files/4997148840.pdfIn PDF document text
    • http://deckdreams.com/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/65970110676.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/bozovujopamo.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/98509247374.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/borenewumajexademitene.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/22929842130.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/kai83rrp9v4ugs8sk4bfea4ck7/nurox.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/35568506288.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/duxixu.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/93861942427.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/72027965241.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/vikezefaviziza.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bced6ee90d9---79446267171.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160adce5369ed1---xikaroresiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=despiertate+salterio+y+arpa+pdfPDF link annotation
    • 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_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10500 bytes
SHA-256: d1f5ac54596e9b5878d129276f2fa47c34ef12ba2e833d90eb0e5239a33d6c1c
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F9 20204 bytes
SHA-256: 47910958f9b5415c26f722a7a93008dee8ee31e6e237d118ddc153294234ea25

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