Malicious PDF — malware analysis report

Static analysis result for SHA-256 d689cde50bf4225b…

MALICIOUS

PDF

75.5 KB Created: 2021-03-07 07:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5e52e8ddfb9af41733a1658df52323db SHA-1: b40db7b6a333c8f9432229cb13a8440aec0836d3 SHA-256: d689cde50bf4225b26fcc8ec6988f3b63832b3efe248e8749760c51a7bd9a3d9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded external links, suggesting a link farm or phishing attempt. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate a focus on directing users to potentially harmful external sites. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=a+discovery+of+witches+season+2+episode+4+recap PDF link annotation
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/gomizobabunuz_guleg_kumakuzumemax.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/zefosu.pdfIn PDF document text
    • https://cdn.sqhk.co/gipagigo/bNzpjhr/13084849568.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/2snijgu/wire_size_chart_awg_to_mm2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_60445cd6385e9.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/remubelogepevi_fezemam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_5fd1950425a47.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/gGNhhbW/mobile_tracker_free_app_code.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_e2af87f4ce5a49e7b9834b0e657ca182.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemazun/analyzing_elasticity_of_demand_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/bufagososubafare.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_f035918fb33545b0b3061c562063b823.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/adjective_personality.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/11639424286.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/fimurovu.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/42723964157.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/como_rezar_la_corona_de_adviento_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/simple_debit_credit_ledger_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/9898973195.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_267ae31656fd4c6b8e8952c727ca712e.pdf?index=trueIn PDF document text
    • https://ebbb41b5-b8b7-4bfc-9e1b-23e79ad93844.filesusr.com/ugd/5eba67_6b06f188bbe247f6851b7321656a4805.pdf?index=trueIn 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_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 5672 bytes
SHA-256: 4e6ec6f023ed2375e39e0f500c2170ddefe8d5751b7c34e271e9e8dee53fa5e3
font_01_sfnt_off0000fbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE0 10616 bytes
SHA-256: a083f6ee9fa3a4782bd3138e2d909d1aa47b6ef2bdb284c34a1a856461c83f9f

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