Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a82ae14660bf4d…

MALICIOUS

PDF

73.9 KB Created: 2021-07-05 23:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c44b8d588bf2d983821fd011c9b881c8 SHA-1: dc2fe11e23a4f0eec9e78843653495ee348f5ea1 SHA-256: 29a82ae14660bf4d6c3783548801ec952e6cb6b11b078c70e38f4eae72ad4eac
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to phishing or malware download pages. No scripts were extracted, but the presence of many external links strongly suggests a social engineering or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=lewis+dot+structure+for+oxygen+difluoride
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d99e027f69---kaziratolu.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/ba651c22bae17c8aee7bbd0096306540/15377477567.pdf
    • https://costabravas.com/uploads/localidades/files/98562998895.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/fupozozuw.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/39335481851.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b00d80cf2d---87251548431.pdf
    • https://actorconseil.com/files/file/12927400704.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/bddb28aed939af8377e7cc44a6e1db91/22230483528.pdf
    • http://ausafe.net/images/art/files/bedawokumotipepepe.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac44463aea5---95794660051.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4974e257b2---pumadupifiwed.pdf
    • http://gtlitalia.com/userfiles/files/78198745467.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vpi4p9uqhscn668osd3povem7h/pomapagebudubebesuwase.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608722b36a0e1---72946933640.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/21f136f67d815fbce4e915eba230ce04/lulawalobezezawomaxiwad.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/hk8r6v876q5b4h7iad1vooofar/xitesaluzafafulenazogexa.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d3af49fb8d8561b84947e21eecd2c7b3/wipoxupig.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/83518828842.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/410b0ab1d88225dc2d9ffaab0addab35/83380027915.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609117b5d3dcc---perugibibutokawi.pdf
    • http://buren-kompanie.de/userfiles/files/rutizoge.pdf
    • http://decamiones.com/userfiles/file/30917086867.pdf
    • http://papaicountrylodge-longstay.com/user_img/files/50016491651.pdf
    • http://zulassung4you.de/bilder/file/kuvipogitimatexun.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4d3ee9194---sepime.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_off0000be25.bin
391138b3df5fa1bf931215b8c406b289884b08fac1f97a02aa1f131fb792c325
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE25 16440 bytes
font_01_sfnt_off0000e8cd.bin
b81f8fb9b8c658528d01a137248b88b3333e58796591bc583664161129723c4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 10848 bytes
font_02_sfnt_off000101e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101E1 16792 bytes