Malicious PDF — malware analysis report

Static analysis result for SHA-256 0237d20df58e35b2…

MALICIOUS

PDF

71.8 KB Created: 2021-04-04 16:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5051d572c4b0e407ed808ce43b50e45 SHA-1: 242236ce76c0ca23c9d10bf79b2e31c506bf122d SHA-256: 0237d20df58e35b229bb8af3bf70aa88b596162a29994744663b53e8368dbfc5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent URL being https://botokaw.ru/wix?keyword=julie+of+the+wolves+study+guide. The document body is heavily obfuscated, but the presence of external links and the overall heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=julie+of+the+wolves+study+guide
    • https://xaxunuvupewiro.weebly.com/uploads/1/3/3/9/133997201/ximamubivupe.pdf
    • http://vutisonoj.sportsontheweb.net/53719649508.pdf
    • https://cdn.sqhk.co/forinabam/ifOvUlY/fuwadirifiri.pdf
    • https://xepolilibud.weebly.com/uploads/1/3/4/5/134591261/bopil.pdf
    • http://tonukavugu.mygamesonline.org/bagabibesizeb.pdf
    • https://cdn.sqhk.co/mogudekusab/Mghjhgf/70961293426.pdf
    • https://cdn.sqhk.co/lagolipumepi/jZTF8ja/nalapuxuxolorewizamibimu.pdf
    • http://lipuwisapi.mywebcommunity.org/car_air_conditioning_system_troubleshooting.pdf
    • https://cdn.sqhk.co/binuwaxe/CZjeNhf/govifaja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_6fb8f97ac1604cd7a5bd3471658dde7c.pdf?index=true
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_e516aa23ce5f4487b82bafafde655d0d.pdf?index=true
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_5eacea41d3134e40a8a45dc2fb01b222.pdf?index=true
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_839f81ce65e4432096b7415a1af23feb.pdf?index=true
    • http://lawesiwewif.onlinewebshop.net/financial_statement_analysis_research_paper.pdf
    • http://veguxakafopuvix.epizy.com/somebody_you_loved_piano_sheet_music.pdf
    • http://sajomapujozokux.onlinewebshop.net/mary_poppins_umbrella_handle_template.pdf
    • http://topunofiw.epizy.com/68135721298.pdf
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_f85cb7a446864776acdf0fc7f95b5991.pdf?index=true
    • http://lumuwejonalar.epizy.com/fukabenugukusibekatexir.pdf
    • http://zaxowudupa.rf.gd/nonprofit_annual_report_template_word.pdf
    • http://sorisavitekinuj.onlinewebshop.net/74472718040.pdf
    • 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_off0000dcb4.bin
ab8705491e19ce4af59a471a61cfc2b179621598953815180415b6fd29e71b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB4 5104 bytes
font_01_sfnt_off0000ee36.bin
c334307ad7c0341ceeb2a74cc738ea6ef0f46fca89224d16fda85297fb7794c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 10552 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.