Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce602298791b7f49…

MALICIOUS

PDF

88.0 KB Created: 2021-07-06 10:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6bccecb7291c4f6849def18106dae4b9 SHA-1: 622dff972cad78d9d580a58246dcc346bc694946 SHA-256: ce602298791b7f497e33377ea66c8e0163d0566ef4a12d5ee870bc77f339ef92
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'Browser extension / update installation lure' heuristic suggests the document's primary goal is to trick the user into installing potentially harmful software. While no scripts were explicitly extracted, the presence of numerous links, some pointing to compromised CMS uploads and disposable hosting, indicates a link farm designed to redirect users to malicious sites. The document's structure and embedded URLs suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/06e24ef1dcdb9413ce64b384239a0b09/17780372480.pdf In PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d721a54ad37---tusugelejofanararosokem.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/gujawolebopuginebuza.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/c5359afc4da423626ba86d824984bd24/91227290108.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/84908395607.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/guwifuful.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160baca90621b4---zobevimesosafaxemi.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607126e770e62---37610336166.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba1add1163---67893698632.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/fakapuxawomawazikufajoxa.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/foluj.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/nabaninaxirip.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/luduxenoxonemafu.pdfIn PDF document text
    • https://cecprint.com/images/file/71316841870.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/j9hqsdr3eaibhi6i526t195go0/befunut.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/jidewalekifuvozewikozus.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8fcaacd0c76966472a9cf6f49c9e6cf9/kijerogimupewakepabaf.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/pigawabozavovafimun.pdfIn PDF document text
    • http://minhanh.com/files/88226144989.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c89ae30f635---sagaz.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/poredowe.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/nipejefav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=reliability+and+validity+of+interviews+pdfPDF 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_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 17264 bytes
SHA-256: da29aa61b8c988fb667b0355753a507b19667b1e9b94f295d81583f470845e26
font_01_sfnt_off00011f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001374b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374B 10940 bytes
SHA-256: 2a05da151e5b2093b0c945d86356edafdeae50dd96e617abebf25b2e1a15bcc9

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