Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b46d4489952712…

MALICIOUS

PDF

85.6 KB Created: 2021-07-08 14:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a70a34f23d068ac0f2d2e6178c8a48b SHA-1: 24c67360c8de1bec4727bf0af871ecb6414113a9 SHA-256: c0b46d448995271267cfb9099fe1c915776bd85754fcc1c997e5e49c466dee9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious PDF files. The primary goal appears to be directing users to external, untrusted resources, likely for phishing or to download further malware.

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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca4263e3f1---fexidudejuvuwopefi.pdf In PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/ba662479cff1a3340c97b90c873daee4/51677111947.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/popadid.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098157245f73---jarororadovatun.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/movoniter.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e85aa948e0d335655c66e585bb666583/31809458873.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/607250541.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ada50c0bd00---8830587778.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///kijugugakuvosumofitesune.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/40294509055.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/waxur.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5065b0451d3fbb262ccfe63b28ba3ea5/84368219121.pdfIn PDF document text
    • http://moristas.com/userfiles/files/364363185.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/bovoximejebezobaro.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/51370700707.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160738d76df49a---42893139591.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/nawopidalav.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/km1e5so55iq1k4l8e0vr0qge5c/defupuxezojuzilig.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ri5qtnnahri1rmr8s647ga0jl7/winugiv.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b04da0d7c---nepenexafokipo.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079423876c73---pilemisubivakawabozorir.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/suxafuboroxujo.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/0199e3285687e07a537a49cd7137b272/36265625722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+many+calories+cooked+ricePDF 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_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 10716 bytes
SHA-256: 9c4ed0115e50fef9fc45e397015d106e796268d6cbc3cc1c06b23e922315e376
font_01_sfnt_off00010599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAB 16752 bytes
SHA-256: c278eef0cde1a4d38116d5064a0cc3142267f4d5fdebfb253c980409b94c49ab