Malicious PDF — malware analysis report

Static analysis result for SHA-256 26356f208f075eff…

MALICIOUS

PDF

72.9 KB Created: 2021-02-07 07:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f4edc18ab4f5c43fe0d01ad358a0f654 SHA-1: 20e631580305fcc98570c2e6201797f1c207b371 SHA-256: 26356f208f075eff6d9394d369384a6d14c73d117009cb5f45a6ee0e61c9067a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://crophysi.ru/aws?utm_term=broken+social+scene+hug+of+thunder', suggests the document is designed to redirect users to potentially harmful sites. The PDF structure and embedded content are consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/aws?utm_term=broken+social+scene+hug+of+thunder PDF link annotation
    • http://free-at.pro/livestream_studio_remote_guestpjrk7.pdfIn PDF document text
    • http://picsonair.com/gupigowogpgxsc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481993/normal_5fe44c9099f98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462697/normal_6015781b49889.pdfIn PDF document text
    • http://efarbok.xyz/sha256_checksum_windows_10zzwt4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404757/normal_5ff63b1148f1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5feafdd6b115b.pdfIn PDF document text
    • http://nagonakog.22web.org/wejuzanepakotug.pdfIn PDF document text
    • http://stalekost.site/warframe_syndicate_guidezavi8.pdfIn PDF document text
    • http://elerctum.org/cisco_catalyst_3850_24_port_data_sheetgugbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5fc93c8fe738b.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/8th_grade_math_minutes_answers157ah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_601d32277ab12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudotepejix.epizy.com/84539154748.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_off0000df0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0C 5396 bytes
SHA-256: 98038c984fbd8be807be2d15e869a5acbd9f28ad1473a0f3c674ebd25fe56920
font_01_sfnt_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 11064 bytes
SHA-256: f72eec024ce09e555a8f9495e6a0c63c4f8078769fc2e9ade88e22288f4f54c6