Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da177d3800107e9…

MALICIOUS

PDF

85.8 KB Created: 2021-09-02 08:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: acecf74c51cb97e671e3fc337d1fa215 SHA-1: 0feb6b128c177bd5d1954fa173f6ad6503306908 SHA-256: 3da177d3800107e91b9f933c5d912b6fde7360e28e06bea4a04a864e8f50b19f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://josquin-capella.de/download/74972402143.pdf In PDF document text
    • https://majorsagilekvaros.hu/uploads/file/88243137522.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/64444803379.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/42e56ce78be09ba4f0d4bc09c07481ab/sotewogutoliwoniw.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c72fc36648b---64633407356.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/zitebofexanisiwagawawose.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/posolixepebeb.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d70d97196f---faruzujironakasazojojuwog.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd2d88ab7---palidozozukudomenu.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/n0f9ikmc9gekf3uh9l0iqg58g6/resikexegof.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/miripigizumufufatanoro.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ca13e576b17e423407fbdb798806166/3471077243.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/38997323613.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/1r290tvogck2ejhettnmuaraan/pilafalutiropadavimutosaw.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/33185766841.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/49376573714.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/99887871897.pdfIn PDF document text
    • http://freeorden.com/media/file/98311539096.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/faxabaxirile.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/u6brcsa9ev5k0ofm48gfal134p/57007045431.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b64e09adc82---73911933199.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/negonevapoxexululat.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087784a3a921---fiwikevegitorodofulax.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/55899035779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+does+initiative+meanPDF 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_off0000e856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 18576 bytes
SHA-256: d3073486caa583a82b5aa6b80ee208c1bd3ad1d8c7b62b2f0399133ec8bb7cec
font_01_sfnt_off00011887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001309e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309E 10428 bytes
SHA-256: da318872c5c236bd097069789e33ac3a89fb6541b93386143dcaa92588ade3c2

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