Malicious PDF — malware analysis report

Static analysis result for SHA-256 9980dfa1d180ea2d…

MALICIOUS

PDF

89.8 KB Created: 2021-06-27 14:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60ce2133e8ceef953fa70d16b0f299f3 SHA-1: d7d028f7e00533008063deb8e0856d822cfcf029 SHA-256: 9980dfa1d180ea2dca5348f66f1be2b8f25a4f0984f336e5957e82dc434fa138
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The document body is unreadable, but the presence of compromised CMS upload links and disposable hosting reinforces the malicious nature of the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://philabc.ru/uplcv?utm_term=pet+sematary+1989+release+date
    • http://historia-bfured.hu/userfiles/file/jejuxe.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/cj0emttqueo667od2lthahhfaq/75025577733.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a82db07005b---1096372862.pdf
    • http://fantalife.nl/userfiles/file/genufopadugapaxajifegeb.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/4ddccf331e6a8bf664e3f34acb7ef16b/pezojumadifatasilezepo.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/9bc4f5e3c5ae5de0cd5fff2ec68b2f4f/fatanonodekabezonesog.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b270e488eae---mijiw.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ec77ac1a---60727405072.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4da0f9073303bc1b273a576dd6f716dc/29510968168.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/77iknm1i0ouhuth8f35fiq2db8/zuzodutagomekatijimazor.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/c549ef412ef2e5271f38c479a9fc53d1/45627004863.pdf
    • http://curry-box-deluxe.de/userfiles/file/93781066489.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c6beaede18c---salagol.pdf
    • https://mobile-translator.eu/app/webroot/media/files/tanoroxagokuru.pdf
    • http://turnyras.lt/Files/file/93917257884.pdf
    • http://aliceinformaticasrl.com/user/pages/73850916926.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/4d48af7a70cf4cc8ae49fa192b730010/50287033298.pdf
    • https://angelsstaff.com/uploads/file/99829759918.pdf
    • http://nct-vn.com/userfiles/file/zogipobire.pdf
    • http://www.deopendeur.org/imgUser/file/zevufupulawizewe.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d1b73ba7d---deluk.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/pck852cnejam9t8uhcpqkh10hm/69784097614.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160788cb949c0f---36776674448.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_off0000fb7a.bin
17e424bb21747650729d5c485d7a1549308a96bb0af6f7bafaf43b684de94195
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 17480 bytes
font_01_sfnt_off0001297d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 16792 bytes
font_02_sfnt_off00014194.bin
cebc80064471f8a904ac7ee27492f4e18cba760fca6277e4ef63468e94c492bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x14194 10636 bytes