Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4569bb2b97fc672…

MALICIOUS

PDF

95.5 KB Created: 2021-03-17 20:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a096a101c67963bdf13e0af6204af189 SHA-1: 5c9472bda7e7920ea5d00ddcebb71c3664b157a3 SHA-256: b4569bb2b97fc67247d02320fe1aec32bca3cc8bc8e24eac7ac5615ea2daa647
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to various external websites, including one with a search query related to 'darkwater pass'. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to drive traffic to potentially harmful or deceptive content. The ClamAV detection further supports its classification as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://druttle.ru/wix?keyword=darkwater+pass+how+to+free+prisoner PDF link annotation
    • https://xajifopuref.weebly.com/uploads/1/3/3/9/133999146/leneforax_gavuvulini_segujitev_zetivoru.pdfIn PDF document text
    • http://malespw.xyz/why_is_my_ninja_blender_blinkingrf3ph.pdfIn PDF document text
    • http://tohld.in/194466863165ftia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_602b72179fd6f.pdfIn PDF document text
    • http://about-fb-support.com/rsos_form_admit_cardb2tu1.pdfIn PDF document text
    • https://kebokezuzak.weebly.com/uploads/1/3/5/3/135318209/5902420.pdfIn PDF document text
    • http://glasshookahcatering.com/what_are_the_principles_of_bible_study_apps04wp3.pdfIn PDF document text
    • http://construt.site/73850369587bw9an.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371246/normal_6008cfcd715ab.pdfIn PDF document text
    • http://abreudesigns.com/58809013254bwhd.pdfIn PDF document text
    • https://gesojotumone.weebly.com/uploads/1/3/4/6/134614539/8282649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462066/normal_600638c8a6ae2.pdfIn PDF document text
    • https://potijesidademut.weebly.com/uploads/1/3/4/3/134351663/tenevonakeluv_juvulofuvoje_rogagodogun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_602632c4972e0.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/44035217960cgz38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_79b36317f1184ed6b6b74dc3e9c843cc.pdf?index=trueIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_bf5a577067b546ea8662dd7747221091.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_f52b87a07bbe4f979f78e9f109f5cac7.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_d50915b154c2471abfe286402a14622e.pdf?index=trueIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_99596c81175f46379ecd839f6ade5357.pdf?index=trueIn PDF document text
    • https://3228dc58-b2c1-4aed-ac20-03fc52793822.filesusr.com/ugd/43afbb_63e877604c4144ca81503c44824bb931.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_7a536dad6f0740a2a9f8055274bfd4b1.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_036b6fa8c2cf46b4b1017c3f45bf682c.pdf?index=trueIn PDF document text
    • https://115777a2-cc0e-4789-9e99-30cf4bdfca1a.filesusr.com/ugd/2b3546_01dd7966a11e44c186397baf87befa38.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_off000136b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B1 5112 bytes
SHA-256: 71dbd8200f42f1f9df42bfaa593f28133bcfca0e7b5fb9aa4c6fba15b70a8d78
font_01_sfnt_off00014830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14830 11420 bytes
SHA-256: 85da8cbe13805ed31b7a915265b54a514cc27b4a7ec4b31de9055b2fbc77c2af

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