Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd3552e0c0e2c99…

MALICIOUS

PDF

98.1 KB Created: 2021-03-20 13:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f8130e27e95eabc05eb41309b3fc22b9 SHA-1: 412cb0a33b34949cb57c1bf8f02bfd2a8f6b67c7 SHA-256: 8fd3552e0c0e2c99dd54bbf852b96602cc19710ff38e1b96c746cf1c98880a66
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://ponafet.ru/wix?keyword=work+ethics+meme', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to 'work ethics meme'. No scripts were extracted, but the presence of an external URI and the nature of the ClamAV detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://ponafet.ru/wix?keyword=work+ethics+meme PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413456/normal_5fe0457b23b37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fe13ba608a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496146/normal_60227797a21ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409236/normal_5fe4365acf47b.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/modowizazulatubulalefiz.pdfIn PDF document text
    • http://segikusi.22web.org/google_chrome_offline_installer_english_version.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/39299180192.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5fe1a5c20c56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_601832597b519.pdfIn PDF document text
    • http://wixiziz.iblogger.org/tenilanapogunoxepunofuj.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/hfZgjjh/nobikitodapetogavotumutan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_602a42cf27885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fc7f677478de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_5fd9d27b87ac1.pdfIn PDF document text
    • https://cdn.sqhk.co/reteletofi/zBRgfhc/sinujorukusajosipeted.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/uptjenl/tuwexenewiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_6052f7a2b99ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_6050384254d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473947/normal_602eb7f6a7719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukevitadej.epizy.com/automatic_air_suspension_system_download.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/93708700591.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/miller_bobcat_225_welder_used.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_off000145b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B0 4876 bytes
SHA-256: 040a66a6e395c9a24419aa522c953636736223c15bb9e961a7854670573a339b
font_01_sfnt_off0001562e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1562E 10884 bytes
SHA-256: cebba82bb3cf246157b7690ad1b89113f799d95b0af1275ba554c4dab1d40643

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