Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fdbd34a1a099c8…

MALICIOUS

PDF

84.0 KB Created: 2021-07-08 14:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc3afcf0c79ecd64de3dbec46a44294d SHA-1: 71b0e4e477dace126fd98815a9f4f098f4b5e7f2 SHA-256: 49fdbd34a1a099c862084d8260663bf59aa9cb1232cd6610f3ed3670cdabc008
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/26708490686.pdf
    • http://megat.pl/uploaded/fck_files/file/ledodugogaligovajow.pdf
    • https://muratay.nl/userfiles/file/50798866288.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/n7krps982h77sc4qtn0e966ua7/rifunidoxijikija.pdf
    • https://liniagdanskzydowo.pl/files/xokipozetokuxugakog.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd54cd4f0a3---maguzegavixatanu.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e57097b365---zawederewedazonekaned.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9ce0bec8---13494869942.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc6c191891---95872032965.pdf
    • http://hnkingdee.cn/Files/file/202169173312.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/852fe6c4b404d6af2b89a317440bbb0d/54034850415.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160beb58cbc3ad---66512586180.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/ehib3877ojhfq9sncgl4iqbi52/sexekatonuzozofox.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/lvetrfe0dr32t5mska3ursvbhi/budowebub.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076e46a5eb58---sodovefumubebututupem.pdf
    • http://duonglaohanoi.com/userfiles/file/56236453381.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4f89a4a165ec1402a26eafe272969412/teforewozijinijog.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/9gbrj1r7m8ib15oe8dt2g26nt4/nekuj.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/af4f42c8f845c6dba445e61df77f9ed2/30977788219.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/nhn2hfjsvlu558ldqjag88pd0d/97225852027.pdf
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3187980534.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/f62216b6fa08d4225124f1f47e3e2414/mozofigareponofefatapak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+quality+chasm
    • 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_off0000e536.bin
8ce1d89f3285b78f48de478ccce39f0f3abbc30eab2d5da12013ff4fcf137d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 18032 bytes
font_01_sfnt_off00011329.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 16792 bytes
font_02_sfnt_off00012b40.bin
ee9e5c55e4376d90654833b1ee9f498fa655288d819cf44b5a4942991b932827
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 10492 bytes