Malicious PDF — malware analysis report

Static analysis result for SHA-256 709c1e090187959b…

MALICIOUS

PDF

96.6 KB Created: 2021-09-19 00:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0bc2064f844d265687c7940165914dae SHA-1: e05ec7f3a2c3bf9191c58181f8aa5d62c434a8dc SHA-256: 709c1e090187959bf52f2114a6b1b9c7e10279ca0e828dbf2828edf5ed1016dd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using small PDFs on disposable hosting to redirect users, likely to a malicious site or for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://devitohomesorlando.com/userfiles/files/37071714338.pdf In PDF document text
    • http://boathousebrokerage.com/userfiles/file/42964643547.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210910193619_1979640145.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/8841753810.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134519e7d7a9---bikabisupovixijuv.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/73141895844.pdfIn PDF document text
    • http://htygroup.com/upload/files/15865015355.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d842534322f180a7efe871148a6c48b8/kowinologovopiparan.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/79116039960.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/39781426874.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/mizaka.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/tulipijerozulet.pdfIn PDF document text
    • https://granitnet.hu/editor_up/wenaxim.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/pomurowawotobotunisosoj.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/vexutegozaperisa.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/gadududobe.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/88681799848.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/3085373319.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/raxak.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/79215539947.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/dudunabagaxoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sony+playstation+2+for+androidPDF 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_off00011496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAD 10668 bytes
SHA-256: 440d4071b7db538b44b2925c5494bbb7831b968c26df794446841c8441a61d60
font_02_sfnt_off0001454c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454C 18304 bytes
SHA-256: 707ff0781242d3c7f0cee823b23fdea842e1293d9ab28d7c858f38198012cdf2

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