Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc1cc0e09b5166c…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 15:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 81ca9ba6efd340d34750a21f68d0d489 SHA-1: 7644bd9e12d4fbdd57d9c1304ed2608e90809d7f SHA-256: 3bc1cc0e09b5166c593455d9579221c3e7615ef868eb2e3b84131b4677a17a79
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains embedded JavaScript and multiple external URIs, indicating a malicious intent to lure the user. The critical heuristic 'SE_SECRET_RECOVERY_LURE' strongly suggests the document's purpose is to phish for sensitive recovery secrets or private keys. The embedded JavaScript likely facilitates the execution of further malicious actions or redirects the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://infrive.ru/uplcv?utm_term=art+of+exploitation PDF link annotation
    • http://robwalker.net/fckupload/file/sapolisozomujiwexajipobit.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/sedugezimavajewozetif.pdfIn PDF document text
    • http://oklogistic.lv/upload/file/16361926921.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/71738363277.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/lakawavodonowor.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/temeramulavekozerusetadu.pdfIn PDF document text
    • https://www.aillant-sur-tholon.com/ckfinder/userfiles/files/10233036698.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/jejikaromojipimolexonijo.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/lotuboro.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/22103779358.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/81348158152.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/60323967226.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/temabegefizafurimupap.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/10605990022.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/61389398732.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/noxasaretakerulijesufa.pdfIn PDF document text
    • https://websbag.com/uploads/files/xuwojaxiwezit.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/53268059603.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/lifawuvenedavitawuvozufu.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/dagugefijowenigururinu.pdfIn PDF document text
    • http://th-hl.com///upload/files/6239314173.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/rareloni.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/90bvae3ufst143lqahg612kceg/34370730720.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/550d6d703dfdb0b8fdc29564f9bdc733/xuxujasafemorogizikuba.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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10268 bytes
SHA-256: 20a674f8d581bcd74155b337bf6c68a42f7ef66e2b82622762528dc22a026a4a
font_01_sfnt_off00010107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10107 17796 bytes
SHA-256: 37d99427e15b26baf9cd76aaf736fadcff703f8cc37e53551b9b22429fd8ce68
font_02_sfnt_off00012efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1