Malicious PDF — malware analysis report

Static analysis result for SHA-256 5faa907441b956c9…

MALICIOUS

PDF

70.5 KB Created: 2020-11-17 10:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0668e342a33136ce764a5e932f8246ad SHA-1: 7ea2c284e8451248950ded71d92a20652123246f SHA-256: 5faa907441b956c9c0b1c6903973b4eb021172196e8f7912597698ddba304148
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain metadata related to a car model, likely a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=2017+mazda+mx-+5+miata+rf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f8f9adb16676.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/ec797.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/kaluvikulepaboja.pdfIn PDF document text
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/wowobu-tazik-moredixasetexeb-favipejanivases.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f9a9818aa585.pdfIn PDF document text
    • https://kirobobu.weebly.com/uploads/1/3/4/5/134593563/vobetunofib.pdfIn PDF document text
    • https://garupiripo.weebly.com/uploads/1/3/4/3/134386314/tajodok-godevekez-sujifakamab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f9e3f962ef22.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/dbbab4ecdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_5faa12d28c88f.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/68feeca8216fd.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/69afc548-8af4-450c-bbb1-10795649ef3e/93818264014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d65e92-85c9-4cf3-a8b0-92b9d6845242/datugazanegapoxafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a6bc41-bcda-4014-90c4-0a0fcb7f9310/la_batalla_mas_fantabulistica_pais_de_los_juegos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34932b1a-6ce3-47cf-8360-3b4cf6bc06c6/xakedinim.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/63061563437.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 5428 bytes
SHA-256: eb5d0f002d702a091fdf33187978211e665f987ba28102b7cf7fcb55d990ef72
font_01_sfnt_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 11088 bytes
SHA-256: 15f0d7b1e40b5f52c06f8617cf565fb1e15807c9f92b034b0854436d68f516bc

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