Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbf5e7e7b71c7e2…

MALICIOUS

PDF

72.5 KB Created: 2021-09-14 16:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8eff55e3d31c9a115b6a37343b94b38d SHA-1: 0d962e7afd6dd855c9512116040d53d07454f66d SHA-256: afbf5e7e7b71c7e2f626d2598c6c8894c2c8a5502fea926fe1caf2f69dc78ba3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to potentially malicious websites. The presence of JavaScript suggests an attempt to execute code within the PDF viewer, likely to facilitate further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://pixomot.ru/uplcv?utm_term=watch+gi+joe+rise+of+cobra PDF link annotation
    • http://unsersohn.ch/images/file/33931537336.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/dinoletasuwixud.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1630950384_a7ad23a030.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/pogezibemimorifisub.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/lunufa.pdfIn PDF document text
    • https://etimes.mn/uploads/files/veradisotojubibufal.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/7147539808.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/86769827511.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/15505752666.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/22578729215.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/14180554051.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/veminut.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/wojegomodobaxezejado.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/fenexavubub.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/85026839442.pdfIn PDF document text
    • https://melz-feu.ru/upload/58318568466.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/riworonapixisinapowa.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/68266992977.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/lisuki.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/87950396342.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/72423541433.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/xenumoxufofajexediletiji.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/98170773042.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/xusujimom.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/gebunepagejewinuvubexeris.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/37640823162.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_off0000b7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D9 16836 bytes
SHA-256: 05925d9317752cb85318f4ec77f9f86123c56ec4e82ce6ef1170850699932789
font_01_sfnt_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 10728 bytes
SHA-256: 89982280e0ad3e03275825fda297b4456054c7c682b9ff0a4422a3ef09724f06
font_02_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1