Malicious PDF — malware analysis report

Static analysis result for SHA-256 686979b0d57bef42…

MALICIOUS

PDF

209.5 KB Created: 2021-03-08 07:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c323bc33742001112a640f380bacb3db SHA-1: a5b27a19e12abd7eba41824e231eba2e43fa83f7 SHA-256: 686979b0d57bef423a5fce1736b8dfd0090ae4e1ae776c65a72f0b8bbacac131
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier assigned a high probability of maliciousness. An external URI pointing to 'https://druttle.ru/strik?utm_term=100+bible+contradictions+answered' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=100+bible+contradictions+answered PDF link annotation
    • http://gakagebir.mypressonline.com/formato_de_carta_responsiva_laboral.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/cidjhdk/armed_vs_zombies.pdfIn PDF document text
    • http://gerakaxow.22web.org/mosokixumowuwixidaxojid.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/verizon_router_not_working_after_reset.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/zuledosevobinekelorisap.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/1jfggUj/battle_tanks_2.pdfIn PDF document text
    • http://liketime.fun/2202655727phpp9.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/didukozanubeg.pdfIn PDF document text
    • http://sidegut.22web.org/airpods_android_battery.pdfIn PDF document text
    • http://vezerfa.xyz/pejerapusirerunapogofansgs76.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/38996945958.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/e1Wiigg/dragon_raja_facebook_the_ex_lord_of_shadow.pdfIn PDF document text
    • http://doropunakas.iblogger.org/bronchiectasis_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jepisaf.epizy.com/sustainability_victoria_waste_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23259f8d-f35b-45db-be60-93b836995f4f/43525893535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b6b386-c729-402e-aa91-a919ca935fb3/wizoturu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1680b953-342f-4040-a244-e6dc2e1345b1/how_to_create_a_workout_plan_for_beginners.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/22101115571.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_off00030164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30164 5264 bytes
SHA-256: 3cf6b4e5cf9ca69e68b860ea2478031a0439ded10a25190e7f10e38f869df154
font_01_sfnt_off00031360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31360 10748 bytes
SHA-256: b71fd6c2856fc8477bca2d4a57d6821f50f7eed610bbb90f6f3a34ed80368225

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