Malicious PDF — malware analysis report

Static analysis result for SHA-256 c678d1450d501649…

MALICIOUS

PDF

87.2 KB Created: 2021-06-30 00:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a77090ac68fef44067fd6a943717998 SHA-1: d5d2fed3aad958b30a2d47cc4efe5b25302aa039 SHA-256: c678d1450d501649afe6f739bd09c4d56f042d040c7009f7f0391eb934704902
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites hosting other PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The structure suggests a link farm designed to obscure the ultimate destination and leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3780ad79c---50325709936.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/7c73da5e8d1d9044300bf2741707f472/95618551675.pdf
    • http://sushikyototogo.com/uploads/files/99240629815.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f0855c66---roxefitatelevibupas.pdf
    • http://doubles301.jp/files/ckeditor/files/vubukibiwit.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/kvp7n8fcg08ev5f3tif0g56qra/molevoti.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/u64in61rkchmjaqumqmb7rrjh7/tubaxezire.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ecd57c70f063b886870e26a46255435/mopuxifutide.pdf
    • http://adams-gold.ru/archive/image/file/sefoxinejopovunumomezof.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/pc33oog9is7lkrcpjg4gr7c7k6/tamapizixozugadeb.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/qshhq7h7ddo1jaadbdrot8dplo/xovuxazokenopobawe.pdf
    • http://bwc.lt/i/92892473604.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/c28h3l8ec6se3542n79eiti7d2/vomapix.pdf
    • http://architects-desk.com/uploadsfile/woluvotazupoju.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/0987262d9300a35cab5016d84ea27cef/66094570937.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/8lprimda5fdi6k5hag3nspdmkg/zobaviduxidi.pdf
    • https://echipamente-scule.ro/userfiles/file/ropalotawol.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160db8c6f27799---52940501274.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/8f19c59ba3a53a38921d234f85266285/93532720217.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/1migrqdgn8r289kdaduqt2a188/80255806362.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abbb86d2ee1---69426527997.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=do+pickled+beets+go+bad
    • 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_off0000f3f3.bin
983257464b4d52d5da4e1dd3b265a2b9d84ebdf2a5c027e8fb7ff51b56b36a89
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 16784 bytes
font_01_sfnt_off00011f96.bin
25afdac3949da71ba56d7cf5cd0e7521c1ea96a5f3c7102216eba7474b0feeb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F96 10720 bytes
font_02_sfnt_off000137e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 16792 bytes