Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcdb025cbec0321…

MALICIOUS

PDF

79.5 KB Created: 2021-04-06 13:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caf95e1fd0d0e3a9403222d365da7eaf SHA-1: 29d8e7ff07962d4418eb24cfcf1dc6f4a103f0d8 SHA-256: bfcdb025cbec0321a0ca25336cb99787b8dd7eaa8a1d952453982b50bd0e1cd0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection as a phishing trojan. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://lozipotod.ru/123?utm_term=phases+eclipses+and+tides+packet+answers, which is likely used to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://lozipotod.ru/123?utm_term=phases+eclipses+and+tides+packet+answers
    • https://ramilelajebow.weebly.com/uploads/1/3/4/6/134647205/edcd756dbc09a.pdf
    • https://vogitoroxubas.weebly.com/uploads/1/3/0/7/130739894/pixajuteve.pdf
    • http://ramedefinu.getenjoyment.net/king_lear_act_1_scene_4_analysis.pdf
    • http://japamawosoj.mygamesonline.org/adjetivos_para_describir_personas_en_frances.pdf
    • http://iciko.xyz/98903227418vdrde.pdf
    • http://youtube-subscribes.com/39149020310kq3p7.pdf
    • http://ruszaimclub.ru/wagon6bg6n.pdf
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5fde588ed695d.pdf
    • http://vutisonoj.sportsontheweb.net/adobe_illustrator_advanced_tutorials.pdf
    • http://betmoy56.com/cyberfoot_2015_indirr7iti.pdf
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fe5a26cf0dda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_28822248fb234cc2b0bf012c00ab6a4b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7469d593-11ed-4c30-9bc8-c381beae7d52/simple_past_exercises_regular_verbs.pdf
    • https://uploads.strikinglycdn.com/files/468bca6d-17a0-4a69-a97d-f375d6bd4492/what_is_a_void_contract.pdf
    • https://8458b573-1d6d-478c-912c-b10a972f31df.filesusr.com/ugd/150112_d93f206fa7d543b6bd590c60f8df1754.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_d3b366e0e0294e8589c16a3c194274fe.pdf?index=true
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_470d8c674df84c4fbc849e315ae5a0c6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0f908b03-d92a-4608-afb9-e24c66c16558/42844121819.pdf
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_861e57c4485a4853a5ca1ca2cb1b0af5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa88.bin
4fbb6ae6e8c7789080ea8518d0d07769159f1eefea63b3c4c2f20046f7358a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 5320 bytes
font_01_sfnt_off00010ca6.bin
fc1ef16dae7952e3157d382622340893e82487fd0d0085d75edd3eb86a6bb50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA6 10492 bytes

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