Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd4c8d1106d321f…

MALICIOUS

PDF

81.3 KB Created: 2021-05-13 09:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e496f35dcff1072e2fcaad6ec0d82845 SHA-1: e3af39f5c0aa779336f8ba3e510af6495d504029 SHA-256: 7cd4c8d1106d321f4694f447ebbd66951f902ad91f207053211df39205b8b25a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'soxebez.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, appears to be a lure related to medical information, suggesting a phishing 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://soxebez.ru/wb?keyword=what%20is%20gram%20positive%20cocci%20bacteremia
    • http://pebogoginugi.iblogger.org/food_delivery_business_plan_sample.pdf
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5ffa2d34a4688.pdf
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/sakivi.pdf
    • http://kalavar.xyz/tulirobazafaxzs80.pdf
    • http://metalllift.ru/kawiruza9heo6.pdf
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/1966088.pdf
    • http://cleanup-sale.site/38118826324bxvwn.pdf
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/vuzikarodemeditixa.pdf
    • http://kikudesazogug.22web.org/certified_bookkeeper_exam_sample.pdf
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5ffc115d0ff1b.pdf
    • http://bunnygummy.ru/rainbow_fish_bookfandf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wozalomar.rf.gd/29481811207.pdf
    • http://xiriranur.epizy.com/talesufukunarad.pdf
    • https://uploads.strikinglycdn.com/files/7f5374fb-07e4-4af1-b123-5fffb676f849/kebomemisubux.pdf
    • http://pujekejiwevote.epizy.com/fugosufivizanofi.pdf
    • http://zetanurujufifis.epizy.com/bodybuilding_programs_for_beginners.pdf
    • http://vodesoxiside.rf.gd/yes_boss_songs_musicbadshah.pdf
    • https://uploads.strikinglycdn.com/files/9cab6a03-4bca-4199-881f-9938e6255f42/zidupobotuluzesumogon.pdf
    • https://uploads.strikinglycdn.com/files/b2c1ad9a-45f2-41ca-97e6-50653b1796f1/professional_ethics_engineering_book.pdf
    • https://uploads.strikinglycdn.com/files/5c99e99c-ae98-4a4f-8633-1f7e747a0226/how_to_help_my_child_with_gymnastics.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001003a.bin
395e726c65b6b1741a31f6cf6cc33fe7a8f57906b3dbbca7f07358981237eb1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 5528 bytes
font_01_sfnt_off000112ec.bin
46b0ed02471262f502bcbdda40fabd3d57f17419783375504dd7214a77023fd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 10940 bytes