Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad6bbdde2a86387…

MALICIOUS

PDF

90.0 KB Created: 2021-09-01 13:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: feafc477bcb4895c4888eb2cd8ebb6a9 SHA-1: 8ead1a0ccc73679e8b9606d4d15999ca6934cf0b SHA-256: cad6bbdde2a863875e06948d334dcff2306a6b0b944db2b7fad9cf72b5fe55f5
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, 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. The presence of multiple links on potentially disposable or compromised hosting reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948207b9f2d---72018888357.pdf
    • http://amandatravel.com/userfiles/file/kiledija.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112a5cf7d250---ragomobezupug.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/adf150a6b71295f87bf79374e4861644/nifusokuwizujujubo.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c7dbe71e0---nugafuxajesuwutar.pdf
    • http://mlight.cz/archiv/file/26979634233.pdf
    • http://constantemail.com/userfiles/file/162583814295678425807.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/6791c88af1a913466d56cd56fa1bb29b/nopilelosepenijapozexo.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090707fa93e7---22813252143.pdf
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/pineni.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b98b267cd67---53763393312.pdf
    • https://securityguardsupply.org/php/uploads/file/4827281967.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087defa87580---38983939078.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/45ea0be7053294fb076f386d52e6ec8b/fisufowatamotudi.pdf
    • http://royalgoodviewresort.com/Uploads/file/1980810778.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/cf212ff37c69c79f13640bfdd8dccafd/86895866447.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47a0c76c6c---72272137903.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/jgc7ukhf94u9bgd5n4vbsmtmp8/vivuleb.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083d9c5c2cfc---64912554888.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075659dd687b---95713177388.pdf
    • https://amgaa.org/temp//files/1134037235.pdf
    • http://bocghebinhduong.com/media/ftp/file/wegozirekukomuvuzonobil.pdf
    • http://haai.org/upload/file/66253134744.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=black+ops+zombies+guide
    • 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_off0000fa15.bin
3d50adda0b7a6f2ef507084eda8c65d2bd08c9f054105f3744ec0f8c6a6975c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA15 11000 bytes
font_01_sfnt_off0001134a.bin
e8d9de23dc3a0b31eb3753d331b2af61859be3fa28bc1792d828220ff4173879
pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 17908 bytes
font_02_sfnt_off000141f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141F6 16792 bytes