Malicious PDF — malware analysis report

Static analysis result for SHA-256 58abd9678e043b91…

MALICIOUS

PDF

64.0 KB Created: 2021-09-20 11:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d02085174d08448a49608e8acf2c2183 SHA-1: ba381df518937f8cbe5130ec30c9b89d86547f67 SHA-256: 58abd9678e043b912e4b0e382134d6fb5fd5b212863e8bd329eae2278da0bbf6
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are linked to disposable hosting and UTM parameters, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

Heuristics 5

  • 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
  • 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://chcial.ru/uplcv?utm_term=nama+lain+komodo PDF link annotation
    • https://nirkongrp.com/ckfinder/userfiles/files/polemudijimamejizudejuzil.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/vogezapigidaxesuvekeko.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/wewovuwiturizuwifawikagux.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/pakolapujipelunegaxanonin.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/duwirimiliwes.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1632028012.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/fimulu.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/34172056187.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/57265272538.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/sipotemakefad.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/83945122659.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/38915273660.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370e94cd9e6---49617909217.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/58165406280.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/29512943527.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136940624b24---donogepafap.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/97708170215.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/26613629590.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/xobutokifunalekoj.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/21861783687.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/91823765361.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/gudipumu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF66 17100 bytes
SHA-256: 27b5916c9e75ee38dbc6746fde59fcf14ec7722db9f10e316255c774e67546b6

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