Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bd0466626a1463…

MALICIOUS

PDF

90.5 KB Created: 2021-08-09 18:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e8b24fb7604bb304f845f278df0be9c SHA-1: 3cdf5d374764e5e43b78bf8a16d88df164f94f97 SHA-256: 59bd0466626a1463ebc2b9d970840baed5b7bbaaaa4f34b5abbf0d8faa918c71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm nature suggest it's designed to lure users into clicking through to potentially harmful sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16085747baf2c2---kavazipe.pdf In PDF document text
    • http://viprealestatebrokers.com/userfiles/files/50916375355.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/8ed93bc903102f2f2d430ab19bffa038/94380578717.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/bikipafide.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/kukimosojazumujosemerefif.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/miviba.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b55dfc8330d---javisuros.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wijonixomogejolexivi.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/kumamofagokexutajana.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/kizugewis.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/82701615948.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/furevijunubaxu.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/12773241324.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/747ccca285c75d4db7e02cdc9037e898/32035994556.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/067qklkfmep32oop92mrhfur9t/serarawalatozisujexa.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/c79fb61501ebe3b806d69035f2e24c8d/12202593366.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/21531005234.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/wefibafoxomaw.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608401927fef3---sopafab.pdfIn PDF document text
    • http://df-2.de/images/daten/file/13523460385.pdfIn PDF document text
    • http://goref.ru/files/file/gevepojaxatidisugevub.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/32779038077.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/tasasetivanogixogufozemaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=music+streaming+services+canada+comparedPDF 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_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 10972 bytes
SHA-256: 772aeb03716861d07cc5da1eb51889967c1fcc3c6d1ac3ca5460f69771e5f462
font_02_sfnt_off00012f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F00 17296 bytes
SHA-256: ec457ec8b3bf384b66965f01e946ff682d1c65399e5a0bb9e840f1952873cb4f

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