Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0194fa5323cce2…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 01:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2ba7a06603c61383dcbd3f41a382300c SHA-1: 9a42cc2b3c27d8e7939f338d1448ff9570ed44dc SHA-256: 2d0194fa5323cce2c8b003c9dfeabef6d5306008505b0dfc6a8089e2ec194fc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm characteristics indicates an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=academic+writing+english+grammar+pdf PDF link annotation
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071546659ed0---9183933952.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-5/20210905051351994896.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/agbm9arq48n6s4q6domotjl4c6/givoja.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/76667784468.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0ff387f5e6218ff00a72589a875cf0b0/jomidunuvopetuto.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac411bd1e51---xaxilokogirabum.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/75359883645.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/54965630447.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/3380049535.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/0d267408c6fbc23cf7b3483799d94017/wafulopewobofizupa.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/78472046487.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/maselov.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/20897843900.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/pimigekuvokuser.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/gupulusenod.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab39125f978---mujulawavilumotero.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/zevofupujebunurifebuwera.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/031559385618.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/82632921315.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/72786974770.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2c38eb53b---40376790907.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a096e64df7e---tamosase.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f827a669965---82153743822.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/89894345332.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/gunej.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_off0000e625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 18560 bytes
SHA-256: 7c97c43db3b5e5a0562ca0bfb11e1ab98e4f0bac262a64ac02adde611d7544ef
font_02_sfnt_off00012f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F10 11012 bytes
SHA-256: 66a368436246bcf9dd503e72d0afa299c1c19080be1ac3e4072c5fe6338a6736

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