Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9db01cf5fdc00d…

MALICIOUS

PDF

72.9 KB Created: 2021-01-24 05:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 85e966e21f6117aab00cd5e28dbc006e SHA-1: 9fa4905a8b98d9ed3d5def03d0dbb555a3f464a0 SHA-256: 3a9db01cf5fdc00d380b1fa16dedce9151b41d979a32f33dd7edf0522f9baadb
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text fragments that might be part of a lure. The presence of an external URI and the high confidence ML detection strongly suggest a phishing or malware distribution attempt.

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://jottigo.ru/123?utm_term=chompy+guide+osrs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fd89600d9d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fe7f430a1caa.pdfIn PDF document text
    • https://site-1178332.mozfiles.com/files/1178332/pro_mx_3_download.pdfIn PDF document text
    • https://site-1178820.mozfiles.com/files/1178820/dragon_ball_mod_minecraft_1__12__2_9minecraft.pdfIn PDF document text
    • http://nomanodix.iblogger.org/any_video_converter_software_free_softonic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fdfd6e4e7665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5ff3921450c88.pdfIn PDF document text
    • https://site-1171435.mozfiles.com/files/1171435/46883519049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420222/normal_5febfad05ff27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369304/normal_5ffce23d4d00a.pdfIn PDF document text
    • https://site-1180999.mozfiles.com/files/1180999/notepad_online_alternative.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/cypress_reporter_html.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/fusaponogozufedepagi.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/37329824741.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/929054204.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_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 5136 bytes
SHA-256: 243bf71cd8d00c6c445f610708bfd5302ef497818fa51a8654c32e9b8b105a12
font_01_sfnt_off0000f23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 10756 bytes
SHA-256: e3bbad4ba52302e3a3f43e9298b89d867fbe8ece260c7be0932c59a897d75466