Malicious PDF — malware analysis report

Static analysis result for SHA-256 369dc315383ec9be…

MALICIOUS

PDF

67.3 KB Created: 2021-10-02 21:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2cd6d0668cc6c1167f57b83f7c3c490b SHA-1: 2dfc13036a6276a55559b0dc630a18abea22f7b6 SHA-256: 369dc315383ec9bec7ccecd94d2088f28ffe9af34bd31e24a4f786302d0712bd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the sample, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://sportsht.com/userfiles/file/fuzufevalubikum.pdf In PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/aca691c6c04144803a9cebcc672f3f4a/zazipilekepojezij.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/7077283272.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/kejeseviwokigefev.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/67516199801.pdfIn PDF document text
    • https://tebra.si/userfiles/file/jezamegikozumefora.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210927_171627.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/95735717606.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/befeganaxojiv.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/lanuzum.pdfIn PDF document text
    • http://foodchemsino.com/d/files/sodivoxixuzagarubufijax.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/61512725609.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71004930682.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/fokilonuzavumekadoxora.pdfIn PDF document text
    • http://ipceurope.com/assets/file/49979937124.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/95129448969.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/22397807497.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/lasewega.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/dobotisigaxasizupuw.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138c1ed5f401---vupujebabigurekexu.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/jumukomapapagetejuwopex.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/pefojafimewita.pdfIn PDF document text
    • http://cpils.com/userfiles/file/riruzanizukolewufazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=nuclear+stress+testPDF 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_off0000ad2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2F 14524 bytes
SHA-256: 2993f88ff047882ab5399e836d256282d146c84b3768bcd1d45f5384b53dba2e
font_01_sfnt_off0000d1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 9984 bytes
SHA-256: b35dc28acf6d1b179117a282b48c5d892ae2c005668ab969168203bf01f490b3
font_02_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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