Malicious PDF — malware analysis report

Static analysis result for SHA-256 80545820299b8c89…

MALICIOUS

PDF

86.0 KB Created: 2021-09-02 06:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 956c7cf96cb5680ab177362423302ce4 SHA-1: a2d8af8c4cc4f33cc11c3a943ef09fb85c326843 SHA-256: 80545820299b8c89253a8186a1d6e49e2a7fa4007e55ae5509f01fd23d56c701
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malicious content distribution scheme, evidenced by numerous external URIs and a link farm pointing to compromised CMS uploads. The embedded JavaScript stream, while not fully analyzed due to its nature, likely contributes to the malicious functionality by redirecting users or executing further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to distributing malware or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=tin+pan+alley+chord+progressions PDF link annotation
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/9114773920de5fd11382015b166603c4/70634216290.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861c2004e51---gataxakorage.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/99667225818.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1f2fc082068ec513f7fc4297870e7abe/6640144056.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/16imkrs8oanbjffrbkelruuqv1/15869812122.pdfIn PDF document text
    • https://lecachet.fr/docs/files/nozokejo.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/gijunitoninijuxeradujado.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/wipojuginoriwomimevodad.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7cd8b77be---60230412369.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6837f37c6---zoxupapijabefijomagu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160868c23c8d46---88763305556.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/08uahft8ggji9mqogvjfm9uekc/14270286086.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210821193020.pdfIn PDF document text
    • http://billsky.ee/files/file/58704488979.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/38764073492.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/18777328218.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607cec0ccc71b---marolidozifuzefuz.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/62589010281.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/virefexififa.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/4383184111.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/2f44c85bdab2811929f7e741733ea531/43228737385.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16080ef48182bc---74329409262.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/63128335464.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609238f50d8c5---kojepon.pdfIn PDF document text
    • https://drsaman.com/files/pulilesexitibuwokasede.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 18172 bytes
SHA-256: 1ab134d98c9b6d0d31c6b964fdb529306d4207dbb75427ebdc1c4a84ceaf006b
font_01_sfnt_off0001192a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 10772 bytes
SHA-256: 7e9b2bd22cb58209a644081aab61a215fa96ba7c6cbf17070683d123a4f69fb9
font_02_sfnt_off000131ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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