Malicious PDF — malware analysis report

Static analysis result for SHA-256 9240620c55bb3f79…

MALICIOUS

PDF

76.5 KB Created: 2020-12-20 02:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ede9d30bb5d8e979f1fb40f8822e101 SHA-1: 9d8c45caacb8cc26a67d806b866ac061088aa200 SHA-256: 9240620c55bb3f7946ff383e7d915d4a83d25853dc55fc062364f26d5a71a6c7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of the external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=ff14+carpenter+gear
    • https://cdn-cms.f-static.net/uploads/4485436/normal_5fb7f3ad8866b.pdf
    • https://cdn-cms.f-static.net/uploads/4454822/normal_5fa080ca6ebb5.pdf
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5f8b3eaa7ed30.pdf
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5fc1a49ee667b.pdf
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f929b8598da6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c8a5cb8a-c97d-44e6-8071-42ac955e427f/21574997242.pdf
    • https://s3.amazonaws.com/guwutivupudutu/ajith_kumar_viswasam_photos.pdf
    • https://s3.amazonaws.com/jagux/certificate_honorary_membership_template.pdf
    • https://uploads.strikinglycdn.com/files/da11f5b2-cbeb-449a-9b94-a70e144ebc71/zalubadusapixet.pdf
    • https://uploads.strikinglycdn.com/files/1ad51a64-22bc-4740-8c4e-3e278f13ed91/automotive_electrical_symbols_free_download.pdf
    • https://s3.amazonaws.com/nijudow/ultimate_skins_installer_download.pdf
    • https://uploads.strikinglycdn.com/files/b1434ff5-45e7-44ef-ad79-2f611aaf9458/gager.pdf
    • https://s3.amazonaws.com/libeganot/metformin_xr_reviews.pdf
    • https://uploads.strikinglycdn.com/files/1e56d184-0b49-42cb-9046-a6df1662bdf9/22190612750.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7f1.bin
9eb0d23b9986fb8b996bf483fbaa3c712aef8400b1ed3027697484d11b78ec53
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F1 5068 bytes
font_01_sfnt_off0000e957.bin
056f3008e4ceb560c2c0bd5c100ef89e1723ded510ee22efc18b4958f4f3684f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 11176 bytes
font_02_sfnt_off00010fa5.bin
73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA5 16204 bytes