Malicious PDF — malware analysis report

Static analysis result for SHA-256 74752ceb0489d0ad…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 10:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 087d8aac520c353337e21396fcde3f42 SHA-1: 152000021f35108108bbc235e282d1494a23ceb6 SHA-256: 74752ceb0489d0ad0b455a9599fa3f75b5b6644b4ecb34df2519c63c955d79c7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. Heuristics indicate it's a link farm on disposable hosting, with some links pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=take+video+screenshot+android PDF link annotation
    • http://lifeline-sports.com/files/file/vinivipu.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/14451171733.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/41131678368.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/narobemosuzenokamar.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/13149285516.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/42836123720.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/rezibet.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///putedudigojekopurojovog.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/8105893177.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132f151a1d68---73648496492.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/jarukikoboxukedabatano.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/9452836805.pdfIn PDF document text
    • http://tlznailspa.com/media/files/bodoxetiw.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135afe2bf0c1---34246150935.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/mopubelowowulemokufat.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/32562045957.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/57726212955.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cf424243d---xetudujolosujejuwelo.pdfIn PDF document text
    • http://santeh.md/img/files/bikav.pdfIn PDF document text
    • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/wuritedir.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf27ee786a---32748728351.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/99178793360.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/voged.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b47e55b6b---55001534034.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_off0000b20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20D 10544 bytes
SHA-256: a744caa693ea2e43c72a964195a38fbb9eac73c9e34d23cfdce5f3ea86644e89
font_01_sfnt_off0000ca15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE227 14108 bytes
SHA-256: 256ff8da1758acf0582be7999089743776c621bba4f4a815e3e38d70ef184095

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