Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e323b3efe6fdd86…

MALICIOUS

PDF

88.9 KB Created: 2021-09-06 21:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 03ed7fd33225332f0ca27a104bb61337 SHA-1: 2c19c987e8060e5ed29b685a19c6765b6237f443 SHA-256: 0e323b3efe6fdd86c5adba198d2d6d4d220209516091912160bfb3f386e9226a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs and the PDF structure point towards an attempt to exploit user trust by directing them to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://www.nevjegykiraly.hu/userfiles/files/36135548507.pdf In PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/nirada.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/18129169623.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/tosolebusinozerupokatirir.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f2017df0d4c75d6f73974d20e59dbd83/76421528101.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/lutisizudageba.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/jididojewimura.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ba31b7d5378---88402919617.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d846c1d665---29186219416.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852d9aae6bf---nepulorurufeg.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/botamexinizo.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/sesox.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/5670651973.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec88feabc7---67977191000.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e67889d355d7dd827e4f7fde0d68eee5/51936151164.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/zalojomap.pdfIn PDF document text
    • http://www.fk-fudosan.net/app/webroot/img/userfiles/files/budadupipume.pdfIn PDF document text
    • http://flgr.ru/files/files/52034338645.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/tilumirexu.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/90412220522.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/18803538870.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/3723952230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=tungaloy+dofeed+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 20616 bytes
SHA-256: d782b4dc958fb9bad561ed10d876cab122952d587289d8a68e47661fc60fe518
font_02_sfnt_off0001281d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281D 10392 bytes
SHA-256: 5ed3ec405bfe81c2e31ab58cf41e29d39b57db0f7c3aa7359c3207cfb80670ef
font_03_sfnt_off00013f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8C 16244 bytes
SHA-256: f74afd43c04b882caf2cf4abe35f4f287291876a5effbe79c277cf827c8612e5

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