Malicious PDF — malware analysis report

Static analysis result for SHA-256 485aee314c0f7d68…

MALICIOUS

PDF

96.1 KB Created: 2021-09-19 04:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c8325c74140267de2b4df8d9a5decac SHA-1: 37aa30eef6ae050620d71541b22918259f67ce69 SHA-256: 485aee314c0f7d689aa2f8a9196f756218b9ac3624266d84db4e1a3bdb92f495
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm used for distributing malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to download a password-protected archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall pattern points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=watch+it+chapter+2+for+free
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e83a31ab5c---90197568813.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161408c7522c4a---80799582391.pdf
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/pefojituxopoli.pdf
    • http://cudicio.it/images/file/woxuze.pdf
    • http://anhbanglaw.com/userfiles/file/7044932323.pdf
    • http://hysansam.com/fckeditor/userfiles/image/nizizuwejo.pdf
    • http://www.bc-arman.kz/ckfinder/userfiles/files/29114474503.pdf
    • http://ozdesignhouse.com/app/webroot/uploads/files/kivasipilanabogelefa.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388df76aa32---20881451379.pdf
    • http://monikaknoblochova.com/userfiles/file/95936209137.pdf
    • https://www.profiemg.cz/upload/ck/files/96060197987.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317296b1f10---mevododesolajalafinu.pdf
    • http://madinaboys.com/easydo%20v2.00/files/uploads/wumunanebiruful.pdf
    • http://guidesdugrandlarge.fr/images/import/file/binexunu.pdf
    • https://inverpalmas.com/aym_image/files/59766091342.pdf
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/porel.pdf
    • https://landtop.com/filespath/files/20210918081019.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1613033e64d089---33765337316.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/meq40kf3gf7u1ss95ggilppq35/veniwaj.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612efa279e7ed---karimurur.pdf
    • http://lecostationery.com/files/file/manezewo.pdf
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/44489631117.pdf
    • https://e-motorcycle.tw/upload/emotorcycle/files/patipolelasakilajura.pdf
    • http://kapsalonvogue.nl/files/file/matet.pdf
    • http://vladekoservis.ru/files/zasizakikobupixigapa.pdf
    • http://vinhthuan.vn/upload/files/pubadaxe.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_off000110aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110AA 16792 bytes
font_01_sfnt_off000128c1.bin
1d63c722b3e3fc5a12ab1ec817abd22b833f89f261a71534a582783e29a3e6ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x128C1 10372 bytes
font_02_sfnt_off00014073.bin
7ed5159eb8d39107ff70126a41b14674b9c346110bccb245c2dc17f2ce2f9257
pdf-font-stream PDF embedded font (sfnt) at offset 0x14073 19192 bytes