Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cb674280e248ca…

MALICIOUS

PDF

94.0 KB Created: 2021-10-12 08:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9e0b0363d1876af36fa92cdc79c76251 SHA-1: 53195e43c63dfb96f1084c79d668c240af7e8edf SHA-256: e5cb674280e248cad23192d1d4e085f1e3400a3b0c797c6e7ee2c7365444b5d1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a primary indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://asavn.vn/uploads/userfiles/files/90010780845.pdf In PDF document text
    • http://proallprint.com/userfiles/files/24372531857.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/mefigejofumutaxotiru.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/45686844143.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16161c0d91a6d4---sopalotenufuvevesezakezo.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/91003693305.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210908122709.pdfIn PDF document text
    • http://danceaction.be/userfiles/file/87489376179.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/34115641599.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/62880149009.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/dutaxiwefufivos.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/87824066200.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/16451f8b2b6de52b2cb09ebb7145de79/48787749728.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/69882866237.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/47140923911.pdfIn PDF document text
    • http://skisun.it/userfiles/files/1919518894.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/17622428743.pdfIn PDF document text
    • https://best-label.com/upload/files/lutod.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/posidexirub.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/42400560690.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/ninutepixige.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/93341910761.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/oscUj7J0Gjw/uplcv?utm_term=mass+effect+3+claw+gamePDF 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_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 20800 bytes
SHA-256: 58260fe3cf1894b5fb1da44dfb27487c2a261af9e8e6b549dacca44ef71676e5
font_02_sfnt_off00015233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15233 10516 bytes
SHA-256: f63f114e38b9f28443fe4fe1d031b1041b88ea3bc31a1108669f339e5711527a

Open this report in the interactive analyzer, or submit your own file for analysis.