Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9d301208812588…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 19:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d8c1b88a38aa2790f5fba2f43e4baa5 SHA-1: bc2e1172f04dfa574f2b1fca3a3aa0f2aecc5ced SHA-256: 9d9d30120881258855ba889394e7211171b20d84cd2174de190905ac1ee4752e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links and disposable hosting further indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=how+to+change+the+keyboard+in+phone PDF link annotation
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4m4psfl7vr9r2dnmm31an5jgdv/37223570359.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/nefexa.pdfIn PDF document text
    • http://iviltra.lt/images/files/libufezotuneb.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/xudenilojanetapiwa.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210909175145.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/64446234760.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/f5289715ecb85d39b26d88ea8fe7c48a/fatotijijujevuxuno.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/wujogagejenenabex.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6567202f9---60110122966.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109112018153046.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/lgsu5hc0jf5olrrho7kbvsef9o/botubosigaweter.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131fb0a8be29---7195931316.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/39916555015.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/tenifaxipitololil.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/zidutetogegarakar.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/2835167551.pdfIn PDF document text
    • http://webs123.com/userfiles/file/55264339535.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/nuwepuzo.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/galave.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/74077849796.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/1528369203.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/40507473030.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/12449411313.pdfIn PDF document text
    • 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_off0000db2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2F 11000 bytes
SHA-256: 331e09ca04a7d09dd94b0b44040ed5f81d06bc05c9f963262a0a5d2627a74913
font_01_sfnt_off0000f44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 18032 bytes
SHA-256: ae8f7a6bbcfc36e0c02c2f1175eb84bad5394bfd03ab0b9b695ccc86e89dde76