Malicious PDF — malware analysis report

Static analysis result for SHA-256 380344fb7d682baa…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 01:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a219bc587670b66e926b598714c0a4b3 SHA-1: 312e544a9f688be72c7885d4369103b50ec3b211 SHA-256: 380344fb7d682baab4df8dfe52439cc862eb456d6f28d5612249e9eede5797d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://spirit-legend-enterprises.com/webroot/editor-uploads/files/basijazonopeja.pdf In PDF document text
    • http://jagdrevier.hu/upload/images/file/vowevopowa.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/kizawiz.pdfIn PDF document text
    • http://silver1979.com/upload/file/gisiguwabu.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/sasupupom.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/68157867132.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/74367316284.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/rupulefizonotogu.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136ce8e0d711---62783471481.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613926364c4be---dudojej.pdfIn PDF document text
    • https://ibextrail.com/editor-images/makewebasaduzoxelinemu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5405dc5523a350ea70528a131a43d283/25426214012.pdfIn PDF document text
    • http://iltorg.ru/upload/file/dubodefugapapovuk.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/84879586469.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/vegudesepeweweve.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/ranirafuxaj.pdfIn PDF document text
    • http://tabletopad.com/images/file/78089383604.pdfIn PDF document text
    • http://tid.vn/upload/files/22664627356.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/61548276332.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/54427494722.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/57728626592.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/31644475417.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/sesigugububeloxuge.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/vudenadelomujupedevoraxix.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/kunoposolipesudunemilabul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=download+apk+of+android+gamesPDF 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_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 10924 bytes
SHA-256: 0fd7def5858734fbb150fe3553bc62e47035e660a8313b70e20d0734a72f6291
font_02_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 17948 bytes
SHA-256: 400cd431b2435dc811357e82b6dad4918ba5684199b42e7e997ba934ab86f8eb

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