Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbeb4d3c6ec1836…

MALICIOUS

PDF

75.5 KB Created: 2021-02-20 19:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 96cccb0854bfe892a631bcc5a60d0492 SHA-1: d341b14990f7b4065816ca8fc39c7e58c453e753 SHA-256: 0bbeb4d3c6ec1836f777223e6c20d79fce41d6d65788022c411ba471f655d810
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating an embedded external URI. The document body, though heavily obfuscated, contains references to 'Python setup.py sdist' and 'wkhtmltopdf', suggesting a lure to disguise malicious content. The primary IOC is the URL 'https://baarspo.ru/strik?utm_term=python+setup.py+sdist', which is likely used to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=python+setup.py+sdist PDF link annotation
    • http://metinozub.iblogger.org/ruwim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fe1966c7d271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcd94a7e26c1.pdfIn PDF document text
    • http://yildirimotobursa.com/56892919676ef8hm.pdfIn PDF document text
    • http://getchambre.xyz/28170232688586uv.pdfIn PDF document text
    • http://motivawka.online/sirubuwasikghp5g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475866/normal_6003c73bde15e.pdfIn PDF document text
    • http://getliterate.online/13008122281a65sp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393359/normal_5fef34428dc53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_602c80a8a5d0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_5ff09b369feaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380701/normal_5ff6b61aa0acf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekamujibatebig.rf.gd/mclane_edger_belt_4l-300.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_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 4844 bytes
SHA-256: f7366ead04f72979dd97c22556e9c221cef4f6f89cb3f6cb1095aedc0885540a
font_01_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 11488 bytes
SHA-256: 6640bac2e2f0434b5828bcbf4a735db0c7a8cb3e41a7214f1b1bf7a82ee0ca95