Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13e6abe0bbd4a2a…

MALICIOUS

PDF

63.6 KB Created: 2021-02-22 03:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5502140b8afb655e12447e81f6e772de SHA-1: a1acb12e03fac098a591c9f665c0f1a29a04b407 SHA-256: a13e6abe0bbd4a2a7db42b1c8ce12b55407c3e84ba7f28446220293394ec0b56
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML detection suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

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://jacksth.ru/strik?utm_term=klein+voltage+tester+ncvt-2 PDF link annotation
    • https://cdn.sqhk.co/fudikuzi/j5BifRY/how_to_bake_thick_pork_chops_tender.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/uWCibgh/narcos_cartel_wars_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/2JjiLvp/what_happened_to_dual_survival_joe_teti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_5ff41b3912a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_6018d96430c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_601b2dfd46c58.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/gibI4ih/strategic_planning_examples_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/pijuvedozuw/pdGCVhb/55029265453.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/chbfggl/netflix_series_virgin_river_how_many_seasons.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490129/normal_600aefcdd8afb.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/0jgggjT/65519462476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_601e82bb03773.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/epson_l805_id_card_tray_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulomalizekuvu.rf.gd/barfi_songs_ringtone.pdfIn PDF document text
    • http://juludix.epizy.com/88011125488.pdfIn PDF document text
    • http://kegunujav.epizy.com/teaching_comparative_and_superlative_adjectives_worksheets.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_off0000bb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB19 5160 bytes
SHA-256: 772595b93ceeca041a43a834ff438fd28ef3babef9d8d2a404a5211e77ddcdf9
font_01_sfnt_off0000cccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCF 10524 bytes
SHA-256: 42e5c3d5f0d293efc5a8ba866bc435a3c90b781d58148a0c3315de752f0afd14

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