Malicious PDF — malware analysis report

Static analysis result for SHA-256 8829e347b9e0fc8a…

MALICIOUS

PDF

67.7 KB Created: 2021-09-23 15:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d5a93b465f0df33b5cdf79f3af889428 SHA-1: 1085986c87fd7e193db1dffa59304a352a85b60c SHA-256: 8829e347b9e0fc8a029155b74ac3d7929a061e110adeb168e4416b315433d807
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as an image-only lure, typical for phishing campaigns. It contains multiple external URIs pointing to potentially malicious domains, suggesting it's designed to redirect users to phishing sites or download further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://infrive.ru/uplcv?utm_term=best+stock+android+icon+pack PDF link annotation
    • https://cncunse.com/d/files/rakikurekogizapefa.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/zepob.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/76665896582.pdfIn PDF document text
    • https://dienmayngalinh.com/img/files/depukitibevavuxovutonija.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/bonafosaduzupa.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/suvateladuvidegowosab.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/zaxofume.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/savedowejovujoposinopo.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f2bb6b795b037ffdb6e600483a73102f/95382479965.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/82725416059.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec0360c90e---tuzefinevojo.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/xewifupepilaxadanif.pdfIn PDF document text
    • http://terryloops.com/E/file/xawikupu.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/likuladoniwa.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/zefagutes.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/pikuxafejezukepexovid.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/duwevidixotopesolopokewu.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/nelulusetebufanulozunu.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/zuxul.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/41924261837.pdfIn PDF document text
    • https://superchills.com/userfiles/file/64375859642.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/wokobuxurom.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/sotumavefomizef.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_off0000ae60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE60 14068 bytes
SHA-256: 2eeeb9b111f4c26a7d0c24349a98315dccafa55a86c5d83ccc5ae639010cc442
font_01_sfnt_off0000d109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 10604 bytes
SHA-256: 29d8de49a36c3f9818311188e31bd602f3a66455adaefc46c8e1c535b1dac075