Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08134d09638e8a7…

MALICIOUS

PDF

120.3 KB Created: 2021-09-03 15:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db47b33b56cd1bea2f65bff68b7c7dd9 SHA-1: bf3caa59794664407dd1b9a880b78882d9ae94dd SHA-256: f08134d09638e8a7660d980fdfa464816f479898432cc21e8b42a2be55fd957b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chptravel.ir/data/file/jiberogajowipajevewonigu.pdf In PDF document text
    • http://mxagproducts.com/upload/browse/file/xaduzirebemewifo.pdfIn PDF document text
    • https://777mto.info/contents//files/98127691009.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611f5743f014d---suxitotelowakex.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103925c58f78---muvotodokezodidit.pdfIn PDF document text
    • https://dineflon.com//files/88502227748.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/64337415997.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210531004952.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/6046b79574f430f192fc02692fb9afdb/61439121926.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/18462832356.pdfIn PDF document text
    • http://abwessex.com/uploads/files/5552129667.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/39181066844.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/81476567899.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/51824555098.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210517065003139.pdfIn PDF document text
    • https://nadamasristorante.it/file/5561953690.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/xozera.pdfIn PDF document text
    • https://dcimx.com/files/valejepisoli.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f0e66e900---73687501868.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/f9c4878bcf192e32e11a808e1033a9f2/mejuxovurapanerunava.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/d9528d26acdd1fee7774f0b88abc0a3a/zujamomasozigubaj.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1609879a47ecdc---tajebopadujonaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=titolo+v+parte+ii+della+costituzione+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001747f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1747F 17492 bytes
SHA-256: 5b2f840217fb2763081b1970afc40a32279aa330ce4440cc47717ebefa0abfad
font_01_sfnt_off0001a1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1E1 10800 bytes
SHA-256: 404e795bbee2f130852b6dd9e4ff5caccbd6e59ac5aa80fe00bea58cfea7bde7
font_02_sfnt_off0001baf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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