Malicious PDF — malware analysis report

Static analysis result for SHA-256 a876bfcfa6b917e2…

MALICIOUS

PDF

74.3 KB Created: 2021-03-01 17:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8976f8740d21c50e3a48d5555934f56b SHA-1: 263786334d3f7f1ab7d2af3cccfaf013a544ba06 SHA-256: a876bfcfa6b917e2090d4fff5f6ee0b7cb633f008510a7f0113688e62595f2be
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs, particularly 'https://vilenefex.ru/strik?utm_term=armour+of+god+song+lds', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to a malicious site.

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://vilenefex.ru/strik?utm_term=armour+of+god+song+lds PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5ffcb5abcb7d7.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/warframe_when_does_standing_resetf9udf.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/y7hZhg9/ding_dong_the_witch_is_dead_lyrics_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_603b4e7c4e791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5ff45fdd2f3b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460057/normal_5fc7b739dc197.pdfIn PDF document text
    • https://cdn.sqhk.co/poniroxam/j0jga7l/vilopofabuvapodevez.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/cjb3jge/toca_kitchen_2_gratis_para_pc.pdfIn PDF document text
    • http://fukoramilani.22web.org/60541081310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462696/normal_603763755c5b0.pdfIn PDF document text
    • https://cdn.sqhk.co/negolura/j7jdfRg/linexeduvefav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5ff94e8057e71.pdfIn PDF document text
    • http://pixubak.iblogger.org/show_battery_percentage_android_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_601e46b01c1fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godemesefiw.epizy.com/horror_movies_mp4moviez.pdfIn PDF document text
    • http://sokobob.epizy.com/gogetasifolafatewib.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_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5004 bytes
SHA-256: 23e3de1a3cbe55b1dbbc197bec7498ef232411a74c474095980bb96c0ca1b152
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 10536 bytes
SHA-256: 75dab8815707ca5a5d29b84cc9d1fb8dcc69349300c4f47a3fb53519a7b1c4ea

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