Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ae0bfaabdd2f62…

MALICIOUS

PDF

76.3 KB Created: 2021-06-10 07:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7e788984610d475345d7ff38727fb491 SHA-1: 267c3400ccb3ed51dd4949c5258f0698ed73ccb7 SHA-256: a8ae0bfaabdd2f6297a2a5044158390a37cbc33228c0b6ad02bd4536f038a5e8
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL points to a domain that appears to be part of a phishing lure, suggesting the document is designed to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

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://archism.ru/pbw?utm_term=vpn+master+lite+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467298/normal_5ff81d10c4ac7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fc7f10a9ab1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466689/normal_5fcc5d773861b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452846/normal_5ff3d7eae84da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_601f160b4cb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_60366c442c774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_60611c11e61a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vevokofeju.pbworks.com/w/file/fetch/144656514/8156949503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac9aedc-4814-40b2-bb4a-903112e520b7/duverebinutebexijube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad9e45d-8b09-4ae6-9888-5933d3fa2db8/multiplication_chart_1-10000.pdfIn PDF document text
    • http://rimogeto.pbworks.com/f/50152309070.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/xusuxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688487ed-7f14-4cd2-a04a-1fe5ace3df73/kizijosivanenezavemun.pdfIn PDF document text
    • http://goxuluk.pbworks.com/f/how_to_share_excel_workbook_2010_with_multiple_users.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eff3fa3-e15c-4de9-bb6f-e146ad7273d3/90882235880.pdfIn PDF document text
    • http://jabodawo.pbworks.com/w/file/fetch/144843201/teorema_de_bayes_probabilidad_ejercicios.pdfIn PDF document text
    • http://kodalomibika.pbworks.com/f/cipherlab_8200_user_manual.pdfIn PDF document text
    • http://naxenuve.pbworks.com/f/mizekiref.pdfIn PDF document text
    • http://zipiwume.pbworks.com/w/file/fetch/144535752/79718602876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5b06df-fc4e-4611-a2d5-339680fa5984/what_is_pellon_interfacing_used_for.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010e77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E77 16244 bytes
SHA-256: 2d9d8380ed069e426ad8ea07276c7891d98e401ed31ef12fc889d1edec3ba0aa
font_00_sfnt_off0000cee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE0 5012 bytes
SHA-256: be8dbb33ab67ea77b3dd408ab5e1e3828dec1113524e662c47312e31e3c37732
font_01_sfnt_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 14712 bytes
SHA-256: ed88f02f12e2f752445b08ffc19e8d7c38439e1826a2a19ca4c90a5fab05ac49

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