Malicious PDF — malware analysis report

Static analysis result for SHA-256 079fbb6ddd6178b0…

MALICIOUS

PDF

85.1 KB Created: 2021-07-05 09:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb6f5917a3809ff4eb62c821737b5200 SHA-1: a811b4aff8bcaea1f2494ad85f28edad916b4821 SHA-256: 079fbb6ddd6178b0f7e37e881aa436f4265aebbb7780fd2234b5efd6ec59ee40
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating an attempt to host malicious files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading malware via these links. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609975e50fb83---10818451396.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b659422c655---97396825445.pdf
    • http://ldbell1965.net/clients/85689/File/19756273267.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86f469f58f---vekezutevumetenazer.pdf
    • http://jjmcp.jp/userfiles/Image/file/16096993314.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/1a5dd93dee89ac402f95104e155007b1/74690482205.pdf
    • http://sumtinathholidays.com/admin/uploadfiles/file/2956853077.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb5ee7976e---83660706352.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/xitewaxuvujodibu.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2e51f94a136a751963ecd0d53d5126e8/gupolixozewowuj.pdf
    • https://matskaren.se/anvandarbilder/203/files/60634824179.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d53e8ec40e4cdc393d256dc0a048abac/97463221028.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b0ee37632---73539573180.pdf
    • https://aedwea.com/upload/foto/39721306422.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/32c8d31cf5fb87ad9686773fa2e1aaa5/pejojojitivimatitet.pdf
    • https://giolog.biz/images/bulk_images/files/91950322499.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6ff80d40d---25828751570.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a54cfdcaf1---guwakorumesidenulevenero.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95c548bed---9483492769.pdf
    • http://bogieclassof67.com/clients/71235/File/65016878315.pdf
    • http://qunjl.com/userfiles/files/52851874558.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f0937d3c3876cdec003cc3646f002e32/22445597368.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/441a4e326706b3d13e64f083184df530/2334605422.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=histology+junqueira+pdf+free+download
    • 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_off0000e376.bin
f397428e7423ef6902166b62acd606dc15a171566b166ef255b229eeb22696e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 11240 bytes
font_01_sfnt_off0000fd6e.bin
f516d1d89744cbef0ef13c1ad3a08582e4531c062f244d72bcc1ad41d02d1031
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 18640 bytes
font_02_sfnt_off00012d37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D37 16792 bytes