Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7568ce9d8078b6a…

MALICIOUS

PDF

86.8 KB Created: 2021-09-18 14:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bae2f6e15c4c70564b8e68cbc2fb20ca SHA-1: 8a48dfe55ea81fdcae102bcee96b794c358e560a SHA-256: f7568ce9d8078b6ac14804e22e890ad5a4e411569c36f149e066423aba3bc813
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting PDF viewers or redirecting users. It also features a link farm pointing to multiple external URLs, some hosted on compromised CMS platforms, suggesting an attempt to obscure the final destination or leverage trusted domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pixomot.ru/uplcv?utm_term=all+seventh+chords+guitar
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/gemodetolape.pdf
    • http://cablexconsulting.com/Upload/file/lesuxetamerif.pdf
    • https://rmp-familienanzeigen.de/cms/files/togozetixewir.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/27083386392.pdf
    • http://titusauto.hu/kepek/file/60592255607.pdf
    • https://halkapsikoloji.net/userfiles/file/53290111958.pdf
    • https://prospr.fr/ckfinder/userfiles/files/bevabiritalovoten.pdf
    • http://poptheme.cn/uploadfile/files/20210905_065940.pdf
    • http://dkmmotor.com/files/userfiles/file/xukemugefufasevasan.pdf
    • https://www.truck-transport.com/ckfinder/userfiles/files/52881627191.pdf
    • http://ciarajewellery.com/editor_upload/file/35167664314.pdf
    • http://ptairsupply.com/userfiles/file/91054500114.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/3o1que9tm6531se5hha5cqn0li/45290028671.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614379fb36856---suwawatufajaxekow.pdf
    • http://hanlacsclub.com/ckupload/files/wudagubomomixawimamok.pdf
    • http://galaxyjewel.cn/uploadfile/files/gevon.pdf
    • https://tramhuonghanoi.vn/upload/files/88603852230.pdf
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/puvelubaxivudofijuz.pdf
    • http://duythuc-bearing.vn/uploads/userfiles/file/90634476155.pdf
    • http://imoroz.by/upload/file/40484368979.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368f825c2a9---jerobuwaxebotakoribusun.pdf
    • https://magiccat.pro/ckfinder/userfiles/files/45508054520.pdf
    • http://essentielles-theater.de/UserFiles/File/99721926850.pdf
    • http://phuketdriveschool.com/userfiles/file/jigaz.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_off0000e9b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 16792 bytes
font_01_sfnt_off000101c8.bin
8b81ca4f87a995505a12eb1379be81dc8efe187c19b6239f761db82cd1fde45d
pdf-font-stream PDF embedded font (sfnt) at offset 0x101C8 10796 bytes
font_02_sfnt_off00011a6e.bin
12a46c47ad9278e185565ba1c4ee0f17a3a9dce7ead98aed47d06c0512d58682
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6E 19472 bytes