Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce31a8360fa88bd…

MALICIOUS

PDF

74.1 KB Created: 2021-06-22 09:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7e6d8788905135f4da47e7d9199de38c SHA-1: 977b72b9d41f3cacb2a5cefc9c8cf89d9beaa658 SHA-256: 0ce31a8360fa88bdd08c3cec9d7fce764163626bfe77fbc7c1c701e466901188
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised websites and disposable hosting, likely to facilitate phishing or malware distribution. The embedded URLs and the document's structure suggest an attempt to exploit search engine rankings for popular search terms to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://drafthe.ru/uplcv?utm_term=lucifer+tamil+movie+download+in+tamil+isaimini PDF link annotation
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/2256904d43bacd5ee59f0e1d37e14cf3/27133703144.pdfIn PDF document text
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/6964914158.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf4f12a800---vumefufebeze.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/32375bld5fh0ntvr9taa2c6pv2/48610218677.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f33e53ec7fdc52a9ddec0f40cb970b20/zogepoluketuw.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd6f564a05---mowawavuxiviwupi.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/7riv0h0ngunca8ra02cj449d1g/72593790640.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7fa881ed4a2ce35a097db941a723b885/lejenejezi.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c171bab4---jakevijagililawodarabi.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/7835954409.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba402e9c5d---15740398850.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/jobimivosekenexovunosopuj.pdfIn PDF document text
    • https://icbacademy.com/upload/files/dirakerewemoronovubafug.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d01455bb0b4---89945465327.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609048986cdb5---84872050708.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3f5628a027f7bffbb3458ff35311e884/zutasolebowaneloderiko.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ql9v3a5pltgq1plh54u5mneec6/26404499280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5140 bytes
SHA-256: e49a8776b92b3a6d37663c539d705b0c88c4d5f1a1a4996a830f7b5364f2c251
font_01_sfnt_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 10352 bytes
SHA-256: db7386395818b6693c186cd1b203a7ba9be29662336770e10e53628febb8f8b0
font_02_sfnt_off00010ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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