Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7d0a46b494c01b…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 15:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: f289c52f45966c4e9658d14cc3be1830 SHA-1: e0940dfcf0153fc919ba3af85ff368cdb6f5e679 SHA-256: 3c7d0a46b494c01b7bf91e94c2833cead1276d1699dc48570abfebd423a2b423
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to various domains, some of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing malicious browser components. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://dansecyr.ca/pdf/file/89726525798.pdf In PDF document text
    • http://paroissedementon.fr/upload/files/vubexinemewezirisitufe.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/34203480479.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/18006729150.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/jemokabegavonivumabom.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/milezenulegatufan.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/bizotapidatogifulan.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/fuxokajagimajera.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/wuginure.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/vopiweg.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/72731922526.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326da534a30---8954442020.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/70126222226.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/ziwijewal.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/68710723404.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/73763990912.pdfIn PDF document text
    • http://erdbau-rauch.at/nigowedutab.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353bdbaa213---foziwenetuzukagemaf.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2eb55204c---pewigewefaxojedomapuz.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/bujufuxasugefuwepin.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/42606665014.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/rotamubosatiduwakofel.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/69065132816.pdfIn PDF document text
    • http://52963566.com/upload/file/202109030219508231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=portal+office+com+loginPDF 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_off0000d1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F6 18260 bytes
SHA-256: f9e6b64453cfe3298d8f4f7426881cc08cf77d0ed40a36a5092674b5c9a908cc
font_01_sfnt_off00010182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 10512 bytes
SHA-256: 90ecef7a4bb5ffd09b0ccda4ecf681d4a4a98bf2d15a228d36ebba9a8a2d48db
font_02_sfnt_off0001196c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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