Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b69377061bc4144…

MALICIOUS

PDF

89.1 KB Created: 2021-06-25 15:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2608aebf34ef0a63e44be3c9d6111098 SHA-1: 7c2b0c900fb3af10aedd6369c858d4ab0da6a259 SHA-256: 0b69377061bc4144561be9e3d80f2e5a2a1171630ad8533fa5d9fe52f00e6d03
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious domains, suggesting it's part of a link farm designed to redirect users to malicious content. The file's structure and embedded links indicate an attempt to exploit users through deceptive means, likely leading to credential theft or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2bbe6937228f4d6b85d939059db0114c/julozejegomodipesare.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2c49cf3b0fb822cc3a42497d7b42e9e6/podutel.pdfIn PDF document text
    • http://groupkaishan.com/d/files/45469057573.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/7b14be20c765fccd63dded18a1a8d1f1/79747100450.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/42m6v1rpv1qnkfdpooniovurhg/58757661415.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/qppa99aivetd3uh748mauhq4sa/rexanasuxizogukaveral.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/6161916242.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/popenixavipidame.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa32a9663e---fuxobe.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/cacaa4ce4c951e3af3a5620eb9c5a01c/vijexefaz.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e66c46f409---62737603306.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66e708443---daruwuzoxududidib.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160723db497394---vagaj.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c56d4208d---18822971765.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ace247497---zagevad.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/xuwagasudoxodosuv.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/44007654690.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/6dq2bj67dnn6g6a0ljkf5dllkd/86377467397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=gcf+of+35+and+42PDF 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_off0000f9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 17576 bytes
SHA-256: dd4fd47d2766d7fc54b8524dbaef539ff8677616ab3bdbe16d476ab49ca2fa17
font_01_sfnt_off00012807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12807 10376 bytes
SHA-256: 6667f3d73dcf2b30603e07e403f68956bda6c2b55c60fb4d04f874b593df91c5
font_02_sfnt_off00013fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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