Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f46606ddcf346b6…

MALICIOUS

PDF

71.8 KB Created: 2021-09-18 08:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 06f6549a72e09cfdbc5612e9d2074680 SHA-1: b65bbf6f697660e800d6658dccbd7998372fc728 SHA-256: 7f46606ddcf346b690bd63650284f671ba70274deae9d3898cb0400dc9a90c21
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to host malicious content. The embedded URLs point to suspicious domains, likely serving as lures or download sites for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=i+love+you+in+japanese+word PDF link annotation
    • https://mimpiindahsatu.com/contents/files/29080301714.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/36833256578.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021091007470873499.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/73556461331.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/jivij.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/43498513785.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/65719147408.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/6920696373.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/90520983198.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/lelisulumelevujabaletu.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/xopumeg.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/ramizojuzojirumixiga.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/topumagopur.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d933db05a---28469551124.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/80825949485.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/12440804211.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/nezeduxowozebatopox.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/5986956769.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/rowotegerazudumufa.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109102104196664.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/5996288037.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/19453510496136809812dad.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/velanolupiwakuwugiruxutof.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_off0000b6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E6 10736 bytes
SHA-256: 2fcaec2a91108646bb32611ceb448480f55a1ebe7b7dc0e5ed628f7d72c730d1
font_01_sfnt_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 16476 bytes
SHA-256: 585f139d0d95b0f42f5c35a9609a0381d49af47eb92978bd179c3c8ed9e52e4f
font_02_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1