Malicious PDF — malware analysis report

Static analysis result for SHA-256 85baa36538f82168…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 15:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ee059d1297bd84cb5fa40d1c3bab0b13 SHA-1: f1a5097c467f9f0a030552d94aa9379f9307940a SHA-256: 85baa36538f82168da556a30f43015a546a45cff53b81202579dca5b9f91cc4e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a signature indicating a phishing trojan. Static analysis revealed numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The PDF structure and numerous links suggest an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

Heuristics 4

  • 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
  • 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://infrapanel-alegjobbfutes.hu/userfiles/file/76881360100.pdf In PDF document text
    • http://tuzvedo.hu/elemek/file/duxubamumiwuloxilapa.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/solezajefigajoxeminimofo.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/14842943431.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/38529725413.pdfIn PDF document text
    • http://live-net.it/file/66330710685.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/gasadosuve.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/jajavasos.pdfIn PDF document text
    • http://ceroki.com/image/files/63491468004.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/53085627612.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/58956086158.pdfIn PDF document text
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/bikudusugagemiv.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/58265161631.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210912042842.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67737423511.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/pasubodule.pdfIn PDF document text
    • http://dfanchem.com/upload/files/10236825320.pdfIn PDF document text
    • https://grup-rul.ro/printuri-fi/files/davob.pdfIn PDF document text
    • http://jump360.co/upload/files/20210912020952.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/44415154055.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/suvuvagibunimutalujimubi.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/peube4ereeke346lvpbvvkklgj/1658947862.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614398a5c2212---71053847525.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/fimirazegabex.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/gewurixanatonetu.pdfIn PDF document text
    • http://slsnn.ru/content/file/87862647804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=redmi+note+9+pro+frpPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 18464 bytes
SHA-256: 690297ce8dadaf7edc4f8fd0a145f75bbfb82e81a814cadbe9d25acc627d5c85