Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a69d1bf0d0d60f…

MALICIOUS

PDF

226.5 KB Created: 2021-02-11 11:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c3527728a1058dbd8138edbdedf96f6 SHA-1: 5d63de1938d195ff0ecd24cd4cbbf41343653ce7 SHA-256: 75a69d1bf0d0d60fc5704a8ea2c1dbe41a3fb33fcfdec2ca82fc86ea967f212b
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The embedded URLs, particularly the one leading to 'jacksth.ru', suggest a phishing or malware distribution attempt disguised as a document download. Although no scripts were explicitly extracted, the presence of PDF-specific malicious indicators and numerous external URLs points to a likely attempt to deliver a malicious payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://jacksth.ru/aws?utm_term=french+revolution+summary+pdf PDF link annotation
    • http://1cats.space/buvenutudixotebzaou.pdfIn PDF document text
    • http://1xbets-reg.site/tarizamzb6jf.pdfIn PDF document text
    • http://indohealth365.online/the_hammer_of_thor_read_onlinel7cxl.pdfIn PDF document text
    • http://teaapple.space/vbscript_excel_format_cell_as_textpf7y7.pdfIn PDF document text
    • http://copyrightviolationcenters.com/graphing_using_a_point_and_slope_worksheetm6xwx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5fe57345cc078.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/sekobugetiwomil.pdfIn PDF document text
    • http://lovelyhouse.online/memorandum_examplest3ats.pdfIn PDF document text
    • http://evromotors.net/airodump-_ng_windows_7msvmn.pdfIn PDF document text
    • http://evatopshop.xyz/ban_gayi_rikshawala_dj_songosjch.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/R8R7Xif/95494848987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jasigobup.epizy.com/agama_jurnal.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/bahubali_2_picture_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/95738436702.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00032f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F0A 5392 bytes
SHA-256: d5f0013dc158c64379a63279cbda496850b5bc6b27efe3bb8de249d656c8cee7
font_01_sfnt_off00034133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34133 13636 bytes
SHA-256: 19f267ade8a500cb047ef051aac8cefe6010e46f2d2020059edab311a1cf82e2
font_02_sfnt_off00036d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36D88 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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