Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe0a964e2a02123…

MALICIOUS

PDF

70.2 KB Created: 2021-01-11 10:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 37c219a3e39253447de64c657b74f404 SHA-1: 1bb78795073836b0b761cdcfd79d6695fc1396bd SHA-256: bfe0a964e2a021237338212866c00f01817e59d3b1ed10192ef7d5c8b87d65d9
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, indicating a phishing attempt. It contains multiple external URIs, including one pointing to 'traffset.ru', suggesting it redirects users to malicious websites. The document body, though heavily obfuscated, appears to contain metadata related to 'Garmin edge 510' and 'wkhtmltopdf', likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=garmin+edge+510 PDF link annotation
    • https://cdn.sqhk.co/nedovipirumu/hfDhaiX/espn_plus_fight_price.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/bIpgdHJ/63659859700.pdfIn PDF document text
    • https://cdn.sqhk.co/nudizodi/ha8ihhd/led_beer_pong_table_diy.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/7318055.pdfIn PDF document text
    • https://vupudotexim.weebly.com/uploads/1/3/4/8/134884591/lozodajikos_tulerexomojujog_xawuvid_kobagamexezo.pdfIn PDF document text
    • https://xivupofe.weebly.com/uploads/1/3/2/6/132681771/7898018.pdfIn PDF document text
    • https://site-1194273.mozfiles.com/files/1194273/how_can_i_speak_english_fluently_book.pdfIn PDF document text
    • https://sozawozoxo.weebly.com/uploads/1/3/4/5/134509422/guxorevel.pdfIn PDF document text
    • https://jukawowirorab.weebly.com/uploads/1/3/4/6/134662443/16495f.pdfIn PDF document text
    • https://ruruzepekasoto.weebly.com/uploads/1/3/4/7/134753799/9373897.pdfIn PDF document text
    • https://tiguxenejizowi.weebly.com/uploads/1/3/4/8/134899735/8047134.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/5icLibI/scorestream_high_school_basketball_team_rankings_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lawakux/biblia_de_jerusalen_nueva_edicion.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/derivative_formulas_class_12.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_off0000d55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 5284 bytes
SHA-256: 60c32d84d7d86f27ec8ac74e717b45ad670a0c4e4cf49a891289622243d27510
font_01_sfnt_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 10804 bytes
SHA-256: a1b96f9aedef629ca7a276fb773e933e11cb30f7bfcea599e7e05519c8b2e7d2

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