Malicious PDF — malware analysis report

Static analysis result for SHA-256 70205daf6ec4f858…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 03:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4194809813dee2c2082b68327df953d7 SHA-1: f6a876cb39330f44eb5bb2879a3b5e6bc0c3b6ea SHA-256: 70205daf6ec4f8585008e6076bfc8f77d1cc1491240a4f30366d4a163911d516
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document is designed to trick users into installing malicious browser components. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme, likely involving a JavaScript exploit to achieve initial execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://kutyasturak.hu/images/files/jowezolazub.pdf In PDF document text
    • http://boxshop.mn/userfiles/files/13000248202.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/88756021719.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/gibibajexuwugatoganikefin.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/7282048292.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/vufiwigiwigewe.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/24282625647.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/1071413754.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109072106353808.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a20169218dbc0765d06892d47a3faf4/67605090442.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/87955098511.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/tuvuz.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/posuzikefelifo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ededf0d714---najanikefogapawitowu.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210912075437.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210916051538.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/gavawuzo.pdfIn PDF document text
    • https://strechybenesov.cz/content/50820009504.pdfIn PDF document text
    • http://deltools.com/userfiles/file/48934847407.pdfIn PDF document text
    • https://activepymes.com/pub/file/nadufofanumagadesalus.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/nelufaxatezig.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/fosekumodiba.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/94522895799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=film+soul+2020PDF 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_off0000cbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE7 17708 bytes
SHA-256: 3213f074212d0b9546c2ed2c21d7897a549e76b7143cf96eeb15a604aaaee5ac
font_01_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DC 9992 bytes
SHA-256: ada4b7c8dbc7bc2957c066aaeed4ed60a6e5d8d6cd70924fca3e9a689511b2a1