Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d067b59a767ccc…

MALICIOUS

PDF

85.9 KB Created: 2021-06-25 22:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dce8b6102836f969dfb292265a1f7411 SHA-1: 97418e103c099dbc7a11fd90b1424ee25b40d532 SHA-256: c3d067b59a767ccc0f1293c32c897cf00b331460ce42d2a00984d3a36b67ca6f
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dozufitobafazobofaxedepot.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/a3d40240d089f44be9616394642e86c4/11684470919.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b81364ae801---41483735711.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ed21733dc---bokoraka.pdf
    • https://adamant54.ru/userfiles/files/gupapufunapojotagirix.pdf
    • https://unserbiokorb.ch/userfiles/file/jaram.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/50add8c887374438b25bf64c216852fc/40581202241.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16070a40a316b0---jusasevolipazotep.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8c9ee1e18d38bc9cdd633677fed52cd/pewivubujipubinixunu.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b1243cdfa5a---xemagalaleniw.pdf
    • http://ipceurope.eu/assets/file/80977796392.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ccngu52qpfa9uk193bvjif9h1l/wujodenelezurawavexaravav.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160979e21c8025---suxodenigemumijaluvimag.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/4982032000.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/6c6f5bc68d6e24ba465d0b600d740c39/50711259011.pdf
    • http://www.aadhar-interior.com/userfiles/file/61375622243.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878faf1de4c---8791336702.pdf
    • http://podlahypilat.cz/admin/file/72020048985.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608763236d9b6---jabetulegiluvobamafe.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1e86baa2---14655858532.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160813ea89fadd---85372239318.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/24f4c4f05f60925a8b104f244be7d1e8/sivok.pdf
    • http://0930actress.com/files/files/tokapivatebipan.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/j0pgdv0obnmvvs3s7kq93fel8q/15219160122.pdf
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/vabisixaxedariwesad.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ielts+15+academic+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_off0000e9b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 16792 bytes
font_01_sfnt_off000101c9.bin
c279a4beeebe838bc2d1c83fa0bc95d1b2aed09f80dba69d39f08803e429ca23
pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 10860 bytes
font_02_sfnt_off00011afe.bin
9d06cf540ab81de686413d052d93acf93b0b43194f679f584cda47b8b94acce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFE 17384 bytes