Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cee2080315e8d7b…

MALICIOUS

PDF

86.9 KB Created: 2021-09-07 04:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 07142b1d5811b596ab3cb97b63a0957b SHA-1: d3f0b5f5ad6307870f8fc5904fc52b60e86cce81 SHA-256: 8cee2080315e8d7b3355fde24238b1ad2b346d5fbb3c7c058fe5b645117bf186
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ovfs841ff5hbsu4egf986nbe14/53895029872.pdf In PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/eae8a01fcea35ced7be9ac3d2f382377/tagodav.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16e528b24d---99023392923.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/kerak.pdfIn PDF document text
    • http://kaitianjinghua.cn/admin/userfiles/file/202109031524174949.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/wolifisabano.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/22884257419.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/domowifutabi.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd78ece90c---nawobeg.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/fopipedosu.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/jitezijividujitonaveju.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/43983019951.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093489f80c4d---73773243553.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/vudolizerizot.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/66065918797.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/13029068649.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a53969f302---72664919011.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a73d0669099---powopeki.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e896d89f344---vukarosiragig.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160842098b3a3c---89030808186.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/xabipepinitoxevovexolo.pdfIn PDF document text
    • http://lamay.de/userfiles/file/90334171561.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=schema+therapy+a+practitioner%27s+guide+pdf+downloadPDF 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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 17676 bytes
SHA-256: 7b142ed851cb66ec6603b682ec6dc2ac95ed9f08813b364f1545959a92a55ff0
font_02_sfnt_off0001326a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326A 11476 bytes
SHA-256: fe9706a3096b240761b7bd9a78182007e0b5cb24bc4a20acb7c16596803465e2

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