Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fe517480833819…

MALICIOUS

PDF

74.5 KB Created: 2020-11-18 11:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d24938e8d6c33dd97356fa918ca39b33 SHA-1: 709337b254d9679f34af347d0ce0e4ab5f1878a1 SHA-256: 97fe517480833819af3c497f39657a3dbf7c17975998b05da6113ab02618dd1c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely a malicious domain used for distributing malware. The document body, though heavily obfuscated, suggests a lure related to downloading software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffset.ru/aws?utm_term=uc+browser+mini+2019+apk PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e4e69d-401d-4d02-a6a9-cc7ef118cfef/xafiworetebowojasix.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/google_sites_intranet.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/whatsapp_apk_mirror_2._17_351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d4ce6b-2a57-49cb-b2ea-87cdfe5f2771/buwekazegorujabem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c11c673-4c6f-4601-afb1-bcd2685cf3b5/ratufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de5d996-e582-4a34-8774-b9fc2b6a7fd0/python_artificial_intelligence_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/49958862075.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/fuzimudokazaxixifojewog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80843b8d-900d-4add-9ccb-4e463cda1cff/58067798181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40aaf3ab-521c-431e-ab6c-3702e8568e89/nusearch_nottingham_ningbo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 5816 bytes
SHA-256: d523fa550269754b1831ed78afc1a46cd285587ce4946b13442b9523b8f9bf7e
font_01_sfnt_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 10056 bytes
SHA-256: cb6d975c273d017bf8e6bdbe19d55db76dc81b3af73be15569b28ff3c31b272a
font_02_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073