Malicious PDF — malware analysis report

Static analysis result for SHA-256 3366ef2b2913d89c…

MALICIOUS

PDF

82.8 KB Created: 2021-09-16 21:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: adf12852da4d957b56d53092b852ff05 SHA-1: b2266406f2fc5e3ca2f8d4ff73bfbb5bd4d22ad2 SHA-256: 3366ef2b2913d89c54fdd872abcd219c67c6ed9415d6739d7a8df831aafd917d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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 https://smidgel.ru/uplcv?utm_term=money+generator+gta+5+no+human+verification PDF link annotation
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/gabibugokadutuled.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210907185329.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/15893008580.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/xaduworagodazirun.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/gufetajeropipeb.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/gulakawoxi.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/pojalamefasijagadusu.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/59056615732.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/fedokawenib.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ben8s8bb3nse5obt2gpojj0920/rofibolik.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/26886654949.pdfIn PDF document text
    • http://altinay-law.com/images/file/10852563597.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16136c80cd2102---39958230099.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/49111944031.pdfIn PDF document text
    • http://strap.sk/uploads/files/nirowafibuvedofefulir.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/47321847307.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/14278292583.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/58105821245.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/78954210169.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/38343500691.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/zitini.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fewita.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_off0000de8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 17780 bytes
SHA-256: f94226ed44cd8fbc3ba1f42f9eab7686af518ab116d311bf1aa346b0ef9e8cb6
font_02_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 10976 bytes
SHA-256: 05948064fd2b086fb2ae058f2d02b588c75e86be73169482b6d8f22f8726eb39

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