Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afe46735bc67297…

MALICIOUS

PDF

82.5 KB Created: 2021-06-28 07:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8913d04e97fe9965cf607d19d8e38a6b SHA-1: cf2d5227f33fa0c12273db0c96a241e681384e79 SHA-256: 2afe46735bc67297b8f418267e28e0bc6acb25af0349f59ef81e5b4e7f1ab4d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://synerhu.ru/uplcv?utm_term=how+to+draw+sonic+friends
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a0bc95fcc---80263338969.pdf
    • http://www.peretprod.ro/content-images/file/49117258803.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c0069ff47---67743012703.pdf
    • https://caribemed.com/userfiles/file/91672569440.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608909fc98e60---66660373827.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c943917587b49fdfb0f7796cb05a778c/15444333949.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/90140496640.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de61e06291---xaloporerujadogu.pdf
    • http://allasclub.com/campannas/file/vajixurasinupemug.pdf
    • http://arunimaflavours.com/userfiles/file/pesusugularuzone.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/c0a76feec88664d21e1f77fb02713130/68720729255.pdf
    • http://imaginove.eu/data/Files/59102762576.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/520j507r33raphsifr2785rob1/gadinijofibetigatudilew.pdf
    • http://liccuza.ro/stiri_files/file/87979195253.pdf
    • http://veterinariomauracotti.it/userfiles/files/95598471908.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c93bf3c633f---86943858992.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2553bf6a16ce914e985983d06e29114c/96030221320.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/rcbpmi5enh1dhcg402a76h2su7/34333439150.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b26b9d59b06---kewonodarekilubazuzopapi.pdf
    • http://webhenevents.com/clients/868374/File/gaxobopipogufato.pdf
    • http://app8itebarandgrill.com/admin/images/file/povasivexipuvivexu.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/fc74a3274b76de44e1bff4f518c2bab1/vetivufaxexutij.pdf
    • http://files.ibiza-ferien.de/file/94339921747.pdf
    • http://mistral-paints.cz/userfiles/files/14793068611.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_off0000df34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 16792 bytes
font_01_sfnt_off0000f74b.bin
b5c165c61c1b58808e5a0e2f8c1d4ba8db3d9f1f8fb82c88c0823864999d992d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 10500 bytes
font_02_sfnt_off00010f54.bin
95a7a756a44202e9ce6680d9f686a5f0a56eec7b6e271be34c15b72691361666
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F54 17636 bytes