Malicious PDF — malware analysis report

Static analysis result for SHA-256 171218d71dc5dfae…

MALICIOUS

PDF

73.7 KB Created: 2020-11-20 03:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 36991041d2acd6216586f76df1974bd5 SHA-1: 069d56d6f1df8486ba72029569fd2be11dbccf55 SHA-256: 171218d71dc5dfae3af8f33070361a170ecf7a3e190e1e66d6cbb99212980ffa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a lure related to an 'Australia visa lottery online application form' and includes a critical heuristic firing for brand-impersonation credential phishing, specifically impersonating Microsoft. The embedded URLs lead to redirectors and ultimately to a PDF file hosted on Weebly, suggesting a phishing campaign. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/770795.pdf.
  • 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/aws?utm_term=australia+visa+lottery+online+application+form PDF link annotation
    • https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/770795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fb4218dd705b.pdfIn PDF document text
    • https://gamaditer.weebly.com/uploads/1/3/4/5/134583337/viguzu-bosudaxuxul-mixixepaxisasab-daxizexaruje.pdfIn PDF document text
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/gelujuvopuduros.pdfIn PDF document text
    • https://jorogusanige.weebly.com/uploads/1/3/4/7/134715450/noxagamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f8d551d8c637.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/ralemu-xirowaxatep-panoroka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad06d41-e1d0-4570-aa58-51735dbb3a87/2006_range_rover_shop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dfe858-b0c8-40af-b91e-e0ea0732b466/xasazuromokukoxuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/642b5203-57b0-4aa3-b63d-e562f3ee39c8/i_m_down.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 3396 bytes
SHA-256: 5834f9c82093c5b5bf9e4cf3207365fdf2645204a8842c1669a0c911903eb12e
font_01_sfnt_off0000e0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 5312 bytes
SHA-256: 3125c88172e97152403d17a83ffed9b4955ea54496a4c41b1813e41f767cfffb
font_02_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 11452 bytes
SHA-256: 47cc750fefa30cbe72ee0055cb167930169337a2b536793794fde0b72dc0b9ab

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