Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e78748104e7b7b…

MALICIOUS

PDF

89.4 KB Created: 2021-03-16 19:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3fa1c699777dff8a875023dcda6d269e SHA-1: e078d947694a13a51e6875ba91e91ea4340c771e SHA-256: c3e78748104e7b7bb56db67ad0c8372f6991c2783295086ac3f0bc18a3051e56
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, suggests a lure related to a manual, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/award?keyword=manual+de+cade+simu+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5fda555639819.pdfIn PDF document text
    • http://raruranakadup.iblogger.org/calorie_chart_for_dogs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_602e85ad86b9a.pdfIn PDF document text
    • http://nuzidixiwetor.22web.org/musanew.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/34817703656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_5fe9fc779928a.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/gta_v_activation_crack_download.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/surat_ar_rahman_latin.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/62286316039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_601fa2d49fb04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_603a17b51ebc4.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
    • https://s3.amazonaws.com/fopalew/change_radio_button_default_color_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/peacock_bird_information.pdfIn PDF document text
    • http://logasexa.epizy.com/artificial_neural_network_modelling.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/alien_shooter_2_apk_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a244d9d-c664-4caf-a10c-737caed196dd/yamaha_mg20xu_20-channel_mixer_manual.pdfIn PDF document text
    • http://pavasokunise.epizy.com/60750758180.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/43602018026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780182c9-7832-47fb-a05a-8e3dd18c9ecb/descarga_gratis_biblia_reina_valera_1960_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/20795234605.pdfIn PDF document text
    • http://basajusevubif.rf.gd/69800940612.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/aprenda_a_desenhar_animais_guia_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c8b7ae-3290-47b9-b89b-7104fd591744/how_to_reset_tp_link_login_password.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/98339542244.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_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 5224 bytes
SHA-256: fc64fbe83d3d8eadf11088bd73bd2dbc161cc54e3f8cf0ffacae377588306553
font_01_sfnt_off000120d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D5 12128 bytes
SHA-256: 797adaa98d6fd0996567dc7ddbec3c0fe080390322105d5dbecd16c663683f3a
font_02_sfnt_off00014832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14832 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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