Malicious PDF — malware analysis report

Static analysis result for SHA-256 3110bce642f03dfe…

MALICIOUS

PDF

51.5 KB Created: 2021-06-08 05:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 289aa16f84961ad4e6eca88ecaca0784 SHA-1: d21d6220ad482bb9d59027e1e8ba9c58ea648e95 SHA-256: 3110bce642f03dfeea43ea3926d6a95cb7551319c3dd2e9a2b63fa76e2677f53
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites and disposable hosting, disguised with search-engine-optimized terms like 'cryptography and network security 6th edition solution manual pdf'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8467

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=cryptography+and+network+security+6th+edition+solution+manual+pdf PDF link annotation
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8114a93c---22647643912.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b3cbeffac---99450457898.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/22558184395.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61a3adf6e2---2620613429.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/n98ih344kvfm86sriplggsome7/sepotemolinasumola.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/bovujimizenufaj.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vos47q9tnciaor7dhvo5d7vv46/58584622578.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/fa0cb2986e311a58a2c11e0cc29a5e1c/wuwutawigiwinu.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160920efe87d4b---68495396832.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/vaxugama.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/53277571496.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2a86e3eb5f6ca17001fe1490e43c55e7/66648133756.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/b04669e51ab16ad2a8fe2783fa553041/datirorematogalolimugaxal.pdfIn PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/59393409150.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c38fedbedb---22742962533.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46354a97d86ad86ef5e129953e20de59/zatisi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/imblmgggfn6p56q8iiqannrjn5/26994958811.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160832cf0a9bd6---kifepegulam.pdfIn PDF document text

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