Malicious PDF — malware analysis report

Static analysis result for SHA-256 409b224c7b60650a…

MALICIOUS

PDF

68.9 KB Created: 2021-02-15 15:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c3a625a77af9f593532850498b7ded92 SHA-1: d3242b76034dc3179c4d0cd2e0cdabd84c852d28 SHA-256: 409b224c7b60650a9c7fc256ede0a6366b1492bcd5dfcb3f7503abcfe3eb4d6b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely to deliver a secondary payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to calculator instructions, aligning with a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jottigo.ru/strik?utm_term=how+to+load+paper+into+a+casio+hr-8tm+calculator PDF link annotation
    • https://cdn.sqhk.co/loxinesupiva/c6giidD/844011565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_601287e9b783d.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/fpDjbJr/stick_war_legacy_mod_apk_unlimited_upgrade.pdfIn PDF document text
    • http://formblckr1.xyz/derwent_reservoir_fishing_report6pv7d.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/thdsxyB/96716502063.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/djjjhib/gudaxurufolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_6019b42729599.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/3T4CneG/21164022127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_6019cb40b8628.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/gjjbPhc/18276037285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_6025de0d85cb3.pdfIn PDF document text
    • https://cdn.sqhk.co/fosigigamef/fjbgiha/jozasovoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd77e3462203.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/lejokonuzesugawuwan8llpp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_5fdb7ef202c02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE8 5592 bytes
SHA-256: 6a10fa4f696905fb4b131c1059bbbd428cf0c01e958e3b0683ea8f7d50fecca5
font_01_sfnt_off0000dfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDB 11324 bytes
SHA-256: 059413704dfee15daf5664c1d38532c272202f903c3c2c2e164dc71819f3010b