Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d73d62a683722b7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 20:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6760d08ee6df2612383fd826011e7a3b SHA-1: f81f43e3cf25b5ce19ead9c287d4048cdea498ff SHA-256: 2d73d62a683722b7e13fc5fa6f2e7e2482deae757c513be59f65e11ca665560c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs that function as a link farm, directing users to various PDF files hosted on potentially disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true malicious intent by distributing links across many domains, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://resortcrimea.com/ckfinder/userfiles/files/77700446322.pdf
    • http://hainescentreasia.com/images/file/bawikiwajigaf.pdf
    • http://ylplj.com/ckfinder/userfiles/files/37417402295.pdf
    • http://ecoaga.com/documentos/file/44963890819.pdf
    • https://techinnsrl.com/writable/public/userfiles/file/35151715310.pdf
    • http://gloteckr.com/upload/editor/file/82580480218.pdf
    • http://bowie.abwingsmd.com/uploads/files/silobero.pdf
    • http://saveursetsavoirs.fr/image/file/kowemixupu.pdf
    • https://navoloki.mebel18.com/uploads/files/nikowixikekamoni.pdf
    • https://landtop.com/filespath/files/20210901161613.pdf
    • http://aci-immobilier-douai.fr/userfiles/files/visalawesikovad.pdf
    • http://hissekurban.com/resimler/files/79624758435.pdf
    • http://klccpa.com/userfiles/file/razotezevujo.pdf
    • http://findingthegrey.com/userfiles/file/34321313432.pdf
    • https://cobaltinc.org/userfiles/file/pemisixe.pdf
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/debisugutamiromo.pdf
    • http://ferrocom-spb.ru/userfiles/files/fuxezanetumizomapasul.pdf
    • http://vxclouds.com/userfiles/file/64657928673.pdf
    • https://flims.atelierleuthold.ch/userfiles/files/butiwupasigegadu.pdf
    • http://mobilahomedesign.com/userfiles/files/10508505495.pdf
    • http://nofatrans-int.com/userfiles/file/xomovofuluwuduzasoxuso.pdf
    • https://e-fasteners.eu/media/file/48458322776.pdf
    • http://eis-pieschel.de/UserFiles/File/19780570139.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=arc+launcher+apk+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a0.bin
74dfb3e5b3f2259a6ce4ffc02f6a07968642b8c41d2c509a9b17e89d46bcf663		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 19084 bytes
font_01_sfnt_off00010bb3.bin
4f84032c2b5f585dbe3d0100fac6209ad861324040eebbcb30ab81d133872a66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 10512 bytes
font_02_sfnt_off00012399.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.