Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ae67ee4cd080f9…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 10:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f3cfe4a263a99e054e1b5c230d7dc12c SHA-1: 97be4532a8fad9a39da9a7a3ad75715f0b7c7513 SHA-256: 64ae67ee4cd080f9659898a372e085c45a2c1a7978ff68840f53b65a7e4b204c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised websites, suggesting an intent to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=clock+time+in+english+pdf PDF link annotation
    • http://xaydungphongphu.com/uploads/files/jezumuxivi.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/dozowuk.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36f65b326b---bedidakam.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/69085886967.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/1def45ef4c2417661755ea19a8d9e824/xapavegunobutipowezabawaf.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c057fadd7e1f314075f4c5aab49bbcea/kizuwawigasitef.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/binijizomezosivej.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160724f0cbc288---61685225142.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/kawepubetaxaxatufekanix.pdfIn PDF document text
    • https://norservis.com/files/files/75257887363.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608412670a935---wiboxutugusigojig.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/98640252034.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e9314a6f263a236ed610b1f17011380b/1459512892.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/xujigujalojedoda.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/octpl9hhtj8q8i3gkfev9a55c2/91835033016.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/jotapev.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/96533453176.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///xarikalumefunuzerija.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/wuxuzuf.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/60a132c865b85b47898c6bb69b5688c6/darewo.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/810ef5b62f59d06b9abc0578019d7b92/5163420122.pdfIn PDF document text
    • 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_off0000d29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 10928 bytes
SHA-256: 514c9df872537efe499c8b9cc5e9d5c0edba87da05533e9f93dd43ac5837c15a
font_02_sfnt_off00010393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10393 18968 bytes
SHA-256: b8787a61cbc2f92e7c2dc2067807e93e91359eeed77099cfd4b82171e4f48c2a

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