Malicious PDF — malware analysis report

Static analysis result for SHA-256 598115bcdf649a76…

MALICIOUS

PDF

74.6 KB Created: 2021-04-08 21:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2a340ebff7c2703d83a7b33f0e9b63a9 SHA-1: ecb4d72ce278755b222188734fc0a402ebe66bca SHA-256: 598115bcdf649a7623dd685f76af8a0cf9d9ef41b7a321a5036b83c7dce5eb87
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous external links, indicative of a link farm or phishing attempt. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs the user to copy and paste content into a command-line interface, a common tactic to trick users into executing malicious commands. The embedded URL 'https://ponafet.ru/strik?utm_term=linux+script+comment+out+line' is likely part of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ponafet.ru/strik?utm_term=linux+script+comment+out+line PDF link annotation
    • https://makumagem.weebly.com/uploads/1/3/4/3/134373862/kigegagavikazoseped.pdfIn PDF document text
    • https://rowigimafusapop.weebly.com/uploads/1/3/5/9/135982222/4305519.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/hjlKDsM/where_s_my_water_3_game_free_download.pdfIn PDF document text
    • https://tewenamizudeko.weebly.com/uploads/1/3/0/8/130873709/9078445.pdfIn PDF document text
    • https://tasekesin.weebly.com/uploads/1/3/2/6/132695719/5597662.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/jgjgieH/metal_slug_6_atomiswave.pdfIn PDF document text
    • https://makumanufomogo.weebly.com/uploads/1/3/0/8/130874647/bojubudixaze.pdfIn PDF document text
    • https://gapemudumowew.weebly.com/uploads/1/3/1/4/131437765/miziwet-fitotadabuke-wobixebudefuvof-zideg.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/pifogota-sozot-tifuduzi.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/ZZMDjiW/tilajigenagufed.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/xisefowu/jinijebezejitewakijagedu.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_a8753d27ae8940e59ee0f010735b7e6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/pilukatinekebirijokij.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/princeton_review_gre_premium_prep_2021.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_5ec6f18c5d564a4293489475b61d6259.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/75218001408.pdfIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_542b0fcabf894b53a7216546a027e435.pdf?index=trueIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_e4c163ae4630439b952cf8e6b5fb6e78.pdf?index=trueIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_9f5c158566ed45fba905d8eddf0bb332.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_b5a288e5b6914f57b6b77745d9805ea7.pdf?index=trueIn PDF document text
    • https://f5d5bca3-0ffd-41e3-a77d-3d805a1e43e5.filesusr.com/ugd/4e23ca_72b2dd527c204b23b1f8e2856a198bef.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_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 4876 bytes
SHA-256: 4907705750b539a8697dcc137c26426c4476d0936a472c40bd4a9cd2ee552bd8
font_01_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 11312 bytes
SHA-256: 4ebacb3256a8da454474c7f40835ebebbd80545169b44e52327569f61f1e742e

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