Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02d6ee8272e09fc…

MALICIOUS

PDF

79.2 KB Created: 2021-09-12 16:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 444145101f923f161819233f2438448b SHA-1: d784d6bd6ee38a03560cd14f98263096b7df8b4d SHA-256: f02d6ee8272e09fc3453204e18d2db393dd079616de45e85eedd1158be5c3ece
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to potentially compromised or disposable domains, suggests a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate it is likely designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://charteriraq.ir/basefile/charteriraqir/files/31282820478.pdf In PDF document text
    • https://landtop.com/filespath/files/20210904031314.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/buxanonipilizanilujajut.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/79f01f81c4e253fe73698934b32de0e0/22845775042.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/novat.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/kivotelixoj.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/pezifewufovenebulexuzozap.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/6904523850.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/75906361365.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/vazinoxuvesot.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210912064642_aupx13.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613648776dca9---lusefuxodosositupimaj.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/48407201306.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/26788436195.pdfIn PDF document text
    • https://777mto.info/contents/files/82229608075.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/jesofegekofitapigimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=anime+live+wallpaper+mod+apkPDF 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_off0000cf21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF21 10512 bytes
SHA-256: 9c4bf2e57bab8ffda267a27d716e10d968289b8967582e680bb40f6f4b5cd96b
font_01_sfnt_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 18984 bytes
SHA-256: 11ec8aa1e9a152c9db6287f01d1bbf0073224fb9668a600687a3448f4d5c5cb1
font_02_sfnt_off00011847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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