Malicious PDF — malware analysis report

Static analysis result for SHA-256 1466fe4cb534b1c7…

MALICIOUS

PDF

87.3 KB Created: 2021-07-02 19:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd007ea171c22b83d53991bdaf042e04 SHA-1: 67e197eff88e26551f7ad753c8ce2f5e2209b0e7 SHA-256: 1466fe4cb534b1c7c0fa6e011a936a3345c8da9672c2c1a91cc128b9bc5c3024
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing lures and malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://archism.ru/uplcv?utm_term=inderal+for+social+anxiety
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/7eb138e59552ab568fab6304cb507a82/janovalexuz.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/614d8bce47f4f9a14bee70340746942c/29666386587.pdf
    • http://akifkasaboglu.com/esatfisek/images_upload/files/16525403197.pdf
    • http://adveotec.com/img/file/xikilatigub.pdf
    • http://agiusfuneraldirectors.com/files/file/mafurukid.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/kce096ujanl20m87sdg89bfea0/54378385249.pdf
    • http://www.vikingmaterials.com/img/jubulurikenavot.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccd059519a---memige.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/88335c87bd03a20de966225cbca9dbc5/92713584915.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d32f3dc27d---dogiju.pdf
    • http://degrossier.nl/uploads/file/nofafosemisuxov.pdf
    • http://stalmost.pl/userfiles/file/tewatadetiziwuwe.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf8790a5b7---tapisizipimogajivimefede.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/1084b21b168237eaf82e0233f0a5085b/teluxutojorifivivov.pdf
    • http://inglewoodreunion.com/clients/68690/File/danuzetukasaw.pdf
    • http://canigrup.com/userfiles/file/23044944677.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/j1oe3gaelkh58chqqtqqa6il8m/34132295013.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aed165da8c---gataka.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3de6331dc8259b8c189b5755dc1fbd5b/nanozemudiwededajoteze.pdf
    • http://ajk-opakowania.eu/upload/fck/file/83795575129.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/us77qv5cjttsr4u4h8caneptv2/52822700667.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/20f71cd726c0a147b51219bf4eaf222b/kofakeju.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/5ec4a6db03aa0f043e464036efb7f487/23607387527.pdf
    • http://bhk-aindling.com/userfiles/files/defusuxujijoso.pdf
    • http://php-lounge.de/userfiles/file/82622852993.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c53407e7d4f---3752445323.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_off0000f2fc.bin
ac2393a127bc795132745ffb13577903c1038d2b1b2490d3d9ef285037a4b354
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 17088 bytes
font_01_sfnt_off00011f97.bin
31fd35c3e02d18594876f553224d29cad70c8acd6b2ce11d25bec34d0b976920
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F97 10636 bytes
font_02_sfnt_off00013814.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13814 16792 bytes