Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ec2b3395028241…

MALICIOUS

PDF

80.1 KB Created: 2021-08-28 00:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9387f16a8f0a60e2d5862280fcdff181 SHA-1: bee18ff3a2a80d37219bd3df98728a97deca8723 SHA-256: b2ec2b3395028241a6dd70bd31344e11e6ffd78e0a73a7d464c77d637eb4f0d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of ClamAV detection and ML classification as malicious further supports this assessment. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://tungafilm.com/dorceiys/ckfinder/userfiles/files/23293115064.pdf In PDF document text
    • http://agiusfuneraldirectors.com/files/file/18819271534.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/juferojotababudunabixi.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210822052830.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/5df50a5fb64695f6af09e7df1c5546f4/45188015541.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885e4e37b2f---wazit.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/3b96ad9dfcd960303955d4f2b6a2acd9/lorofibinikovap.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/smh8nivek5k177hh4kfftv2ef0/sitolorimir.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/30458892170.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f910192f9b---norosisenokebo.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/13165366325.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/1sik7gvbououv1eh7vvbmcepkl/39133200440.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607160c985082---mujasivuj.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/535eaa18693fc68a52ac74bbe29680e1/83280708673.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/66847280265.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/haq63fc80bd6u7469ekeiu8bde/ketosetebe.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/tiduvawopu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2c0d24b4d---gepepid.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/zikapiwigus.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/82238597577.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2a7374ef9bf5d7469be414c468a43c49/kuwufudevotifukoxiz.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/bapurimu.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/h3796kv1ntr7ckmmob6hk6m6h0/xodadid.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/nemebowipupatikerotus.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/92593325264.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0dad26df7---30298332933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=photoshop+crack+for+macPDF 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_off0000d45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45D 10464 bytes
SHA-256: ee60bca91e3faf7330ad1ec86ccc5c864ceec2a35deb74552b1f01d564ac24bf
font_01_sfnt_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 17444 bytes
SHA-256: 8d9511141168228b1d1092aee4b107df039e34a1c7792ce56be56585906cbba1
font_02_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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