Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f336db71e53a07…

MALICIOUS

PDF

96.1 KB Created: 2021-04-12 12:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a2f0a002429d7bd9c8e557753cf0cc SHA-1: 217c9e5f6ace0b5a840a70a9a9cdd5b95dc24de5 SHA-256: 43f336db71e53a07a237e899959446acf75adb6a1afd3d684c58a5d1935332ec
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick the user into navigating to a malicious site.

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://kuzutuzo.ru/strik?utm_term=acurite+pro+weather+center+manual
    • http://sovumeriwox.mygamesonline.org/altered_carbon_livro_2.pdf
    • https://cdn.sqhk.co/rufebumu/yXifii5/war_crimes_of_ottoman_empire.pdf
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5ff0889671c55.pdf
    • http://tetiviguxawik.getenjoyment.net/sig_sauer_p320_full_size_leather_holster.pdf
    • https://cdn.sqhk.co/nadudegimew/gvjdtjg/tatatofomilawoli.pdf
    • http://toworugesolur.getenjoyment.net/car_t_cell_therapy_review.pdf
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fd2af17c81c3.pdf
    • http://vukufitu.mywebcommunity.org/how_can_i_get_a_form_ssa-1099.pdf
    • https://static.s123-cdn-static.com/uploads/4371267/normal_5feb7667a3ff1.pdf
    • https://cdn.sqhk.co/gojinuma/agg0icU/fezotejatukafexidowaluzer.pdf
    • https://static.s123-cdn-static.com/uploads/4498994/normal_6001cfa40e9e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/joterige/kekogevo.pdf
    • https://s3.amazonaws.com/fovezewi/ark_foreworld_myth_guide.pdf
    • https://s3.amazonaws.com/topipovikapari/cgp_gcse_maths_workbook_answers_higher_online.pdf
    • http://jokubamobivavum.onlinewebshop.net/21375174494.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/blessed_be_your_name_flute_sheet_music.pdf
    • https://s3.amazonaws.com/pidufozu/place_value_definition_for_second_grade.pdf
    • https://s3.amazonaws.com/mupukesunobaga/the_butler_act_1944_disadvantages.pdf
    • http://zudupaxub.myartsonline.com/vejuxijutuduf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c7b.bin
de4467f8c8fcd236fe737eeff470a7b53b368a6aa175c0c1aa77d3d405d85a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7B 5076 bytes
font_01_sfnt_off00013da2.bin
02ab7583e6b52953828aa977f295685f34d9e58333de42c2cc3a91b22a19123f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA2 2460 bytes
font_02_sfnt_off00014872.bin
39d1335b67fdf6bdbfb36dfa2c01888c26f61c40db10567e439b9dbee20a0f92
pdf-font-stream PDF embedded font (sfnt) at offset 0x14872 12540 bytes