Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2ae5b40364e4a8…

MALICIOUS

PDF

93.6 KB Created: 2021-06-29 02:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6f8f84368c651cfe3062b2aa7d47957 SHA-1: a7c1483233bd887f4cba948e1a2b001c27466f95 SHA-256: 9a2ae5b40364e4a8100bac2f2e807cd3eeab6d74f1cd089dd2bbb82ec02b9ff3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a non-clustered link farm on disposable hosting, further supporting the malicious intent of distributing payloads via deceptive download links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://coretry.ru/uplcv?utm_term=free+download+mockup+polo+psd
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a7f8cc43acae7d0142c215654f4c62e/70967058016.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2sreair6v623dierkm127692v2/48339428342.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d16f06eb36---98438347495.pdf
    • http://tubietelbar.hu/uploadfile/69085338506.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a23d4a736b---76894263489.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608301433e045---takogaxirejazamamevifat.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160894ac440606---91773966889.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8748239381a49294f8516c6124f1aa35/jopisimasotozege.pdf
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/96440012440.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/834e8b46bd6c614232325fd0473dd7b5/47041432137.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2c530fcbce9dee9ff49ec065083e351a/xenedenoboxafebozin.pdf
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/99451016159.pdf
    • https://foundryindia.org/userfiles/file/bokibupu.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/3bcd8780d7c9281a650bb679fb484e8c/zodime.pdf
    • http://sosnovgeo.ru/userfiles/file/70524550236.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d4cd9c056ff22c3215f5587ab39ec22c/zadamolojuwipalepegidedof.pdf
    • http://cascinamana.it/userfiles/file/wefuv.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/6d2c3adb6382d2a589c86c8fabd470de/4408820420.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b759991c9a---80482987670.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b0fbce489a8828b68d603a76db1cc5c6/kidexanegiwajezujef.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0af9ac1fb7---26204662998.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aced875bf3---42488423347.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/15daf976f87d2fc7c8d88ce7edba2d01/mikapumoru.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da4ec25f5c5---17660628908.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2B 16792 bytes
font_01_sfnt_off00012642.bin
a94b164df52bb92dcc0e80c5f8d4cebc0c7d6b7b66e07d08014891fc38eb06d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12642 10740 bytes
font_02_sfnt_off00013ef5.bin
52787c664406a0566139e5a102fafc34a6bfec121d5a28f385ed38b2fa7a90f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF5 16232 bytes