Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08d1c26af1dd088…

MALICIOUS

PDF

93.0 KB Created: 2021-07-23 14:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0c2643d112373d21f43ea42626cf5d77 SHA-1: 2036dfa78ecc00e24261a4c3957f2c6c138ee089 SHA-256: d08d1c26af1dd088dd3148f40b0c674cabc1e2262869e1def4378cc049b2dae9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm, with many URLs pointing to compromised CMS uploads, suggesting an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, some on compromised sites, points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075be8a457c1---97383393955.pdf In PDF document text
    • http://thebankcardservices.com/uploads/files/66877704296.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608cab3f3d8b8---29607988888.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/81671206279.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/63900382858.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621866350.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/35201003910.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/d76490be79b69c92772ac28b78e0ceca/rudutazafarufawojasapif.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/edae0f34ea9c5fc269784197dfafb722/tiwanasobowaju.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/76230483416.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2110b028ac---33727979420.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/letedivu.pdfIn PDF document text
    • http://4bx.pl/public/file/40697808368.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/48750242376.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210707040813_ieizo3.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9gui7aa7vnr89mftp0cj9o4rf0/86332324996.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210616004826.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/9234f5b45236daae23c54c3fdd1b4d65/19714535847.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/94662094101.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/togufeziv.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/43eb67b32b837698e800322a457e3818/26171025021.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/50910331595.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=the+collector+2009+movie+download+in+hindiPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 10992 bytes
SHA-256: 322fea84b1be5c62c13066af988c40c3a18eff90d4c93d7ce17187f91da7e351
font_01_sfnt_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
font_02_sfnt_off00011bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFF 18124 bytes
SHA-256: 0723098adb32f7af535a5974736f9d329f6701fa7e3b7810cb56c5699b8ebd4c
font_03_sfnt_off00014a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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