Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7a60ab01b00e16…

MALICIOUS

PDF

71.6 KB Created: 2021-09-26 13:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a00bd453005eecaaf9277fa4667cf50b SHA-1: 207362de9acd69fb0838e87f5c1091135b0d09c3 SHA-256: ea7a60ab01b00e16345525218455fbba25b3c928d67d0ef5b9b1ea3955abf0f0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, indicating a likely attempt to redirect users to malicious content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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.
  • 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://crestviewshopping.abwingsmd.com/uploads/files/22112369928.pdf In PDF document text
    • https://skatrip.com/basefile/skatripcom/files/68124292814.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/73158413582.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210905111342.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf1087bd6f---lovovifinuvafu.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/wosijogofil.pdfIn PDF document text
    • http://4bx.pl/public/file/pokijiwumirizikoteji.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/8270573120.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/91641327468.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210902125215.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/u56t7m21es8dv5r5921lumvbal/rilorasarinubinojileveb.pdfIn PDF document text
    • http://dzerzhinsk.timebank.ru/sites/default/files/photos/pagefile/budokaxulu.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/66026405409.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/ridugagidunadabivedilafop.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/gidizeturupimu.pdfIn PDF document text
    • https://penzion-palice.cz/content/13564383246.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/powejo.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/59772878649.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210901_2DDAD5FF384AC41A.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/neremapazagozuzezuganuk.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/vojuwadasotitewoga.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/kikajurukudulomaxojadorad.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/semazigob.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/34569876035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=noise+meter+app+android+freePDF 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_off0000b44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC62 10588 bytes
SHA-256: d3be33aa60bc0e395ba0104b01f4620cb17757536d4b005bcfa066649231b98c
font_02_sfnt_off0000e48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48C 16832 bytes
SHA-256: 88623138d6787575a49b889e10f8c192f66bd9efa46f6aadece0d123e0f15f9c