Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ebdd1266c2d7d8…

MALICIOUS

PDF

86.7 KB Created: 2021-09-07 08:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b46dea17943b0471325a990b54e64a9d SHA-1: 69c37260c684563e90d48c1d9cefb829de3e08da SHA-256: f5ebdd1266c2d7d83f70a3361a83621e0b196b15ad776c4a7cb409f82db70e12
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. The file contains numerous embedded URLs that form a link farm, likely directing users to phishing sites or further malware downloads. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=materialistic+interpretation+of+history+by+karl+marx+pdf PDF link annotation
    • http://dymenahealthcare.com//upload/fckeditor/file/30841116152.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607132213060f---80993754380.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/rokomidirobepubipazoned.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/51551680544.pdfIn PDF document text
    • https://clubon.top/uploads/files/66563907157.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/76535322217.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b455de86fb6---58388458694.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/97267837239.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/18633694092.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca943419fe---44814303040.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210820120548.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/76829840508.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/0291c4e1679bfe651c8e3f92b9e9baa0/vuwepevepujineno.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c978773678c---4347472163.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/digufavuzaxoroxekativeme.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/9ca761da5dfbba7c071ae16302eeadd7/bozekezabosilas.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/tii2bfrei3kv8ghptd459ho7i5/dozadupovorudaluzomotaf.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/34913432400.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cefaceefbf---6258999691.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac33f0f0735---17585287122.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160826f4faadb6---69807509774.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/59538770621.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/79221630984.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb615239141---guxavaxejol.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_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 11328 bytes
SHA-256: 4e51f30d47108223697642b9024821e7feff486ec339c20b6e41b7ecd9184e33
font_01_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A0 21676 bytes
SHA-256: 11ffa51bea86d8c600b1918dfe255ac38e0b725e76a79f8270096fb7a18bdd74

Open this report in the interactive analyzer, or submit your own file for analysis.