Malicious PDF — malware analysis report

Static analysis result for SHA-256 e706dada0682e74a…

MALICIOUS

PDF

72.9 KB Created: 2021-03-20 10:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ad4874eadc14b862e0472bf88e9867e SHA-1: 5d5e94a2c3d75717a514a89ac7669f4f6e658b81 SHA-256: e706dada0682e74a8b9b302407b5a0ce52f906711bbb206423f0f18885dfbb27
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier. It contains an embedded URL that leads to a phishing site, disguised as a link to a statistics book. No scripts were extracted, but the PDF structure itself is indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=multivariate+statistics+pdf+book
    • https://cdn.sqhk.co/pasivuzuke/fgchjji/timiwumetitivuno.pdf
    • https://cdn.sqhk.co/bupedamarib/igW0ET2/waxinaledimivamabepijazal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_f4d4fb49b8b643809cc840ccd647da59.pdf?index=true
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_cd297227fbc446caa4a134c877e4445d.pdf?index=true
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_09938c6acc4a4298b53d7f7da4473748.pdf?index=true
    • https://s3.amazonaws.com/gasodamuza/97857816847.pdf
    • https://s3.amazonaws.com/zuponefi/44468283634.pdf
    • https://s3.amazonaws.com/rupatojuko/how_to_watch_judge_mathis_live.pdf
    • https://s3.amazonaws.com/jinabom/zafiforasixamasuroxilan.pdf
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_bd44ef0b0a7f4721991c9992fd367382.pdf?index=true
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_f51ee6463b4047ddb157b983f211c931.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8da1b752-286f-4f2e-a00c-3092e95f9d3d/lapeluwunowaxi.pdf
    • http://xenivut.epizy.com/19688190251.pdf
    • https://uploads.strikinglycdn.com/files/bb0eaa05-8b74-417b-ae4f-0c339bd3c864/faninukirimubojepefexi.pdf
    • https://a0874d7f-bf12-45d6-9804-ef0afb172e3f.filesusr.com/ugd/cac9e4_cbd781fb2f9e42e9a35cbf7b0b90fb6c.pdf?index=true
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_01a61ec44fbf46de9426476c00eeb6cb.pdf?index=true
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_231b76a4a6a74294a1919ae2acce8165.pdf?index=true
    • http://juxudawalugevop.epizy.com/merenuwasozijegotej.pdf
    • http://lagamifex.epizy.com/1817016452.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df27.bin
6cec524fd8bcc487bc27037e13302bc3cef96551867db2f782bb3c95866a7623
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 5416 bytes
font_01_sfnt_off0000f1b8.bin
6f5665ff242cf0555dd36e0ca32158019eee2a5f4c539a3ee95ee99dcfdcf5b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 10908 bytes