Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f64cd3dcb2438a7…

MALICIOUS

PDF

85.3 KB Created: 2021-03-23 03:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b89c4608751d5a865251701aeffb9582 SHA-1: 247cfbe2976bc8b8b6f2281edeb6a690134f1966 SHA-256: 3f64cd3dcb2438a750aada63be4738b216fd171e4bf24ad7afd427eb6875f45b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to 'baarspo.ru', which is likely used for phishing or malware distribution. The presence of this URL, combined with the document's deceptive content masquerading as a textbook, strongly suggests an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=music+appreciation+textbook+high+school+pdf PDF link annotation
    • http://nimidarizul.22web.org/fovupadituje.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/Yiacj1c/hepatitis_symptoms_in_men.pdfIn PDF document text
    • http://vash-fasad.live/vedavapigofekumewvutw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494673/normal_601f13fc8a6e8.pdfIn PDF document text
    • http://tifeguga.22web.org/codominance_predicting_blood_types_worksheet.pdfIn PDF document text
    • http://petrol-v-pol-price.site/43824677107kkagm.pdfIn PDF document text
    • https://cdn.sqhk.co/wovovoteg/bgggfia/cerato_2011_manual_consumo.pdfIn PDF document text
    • http://nekretnine.site/adobe_acrobat_distiller_5.0_free_dowgolqt.pdfIn PDF document text
    • http://meetsol.xyz/what_is_the_half_blood_prince_movie_about96hq0.pdfIn PDF document text
    • http://chestlune.online/does_gage_die_in_pet_sematary_2019vorn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_602fb50db0d02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/189bfff2-17fc-480c-87e5-a290861125b3/saeco_talea_giro_espresso_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55934ec-e02d-40c3-b24e-69e46e9b55d4/59675022466.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/98768759520.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/luzekejobepunilijepe.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/bhai_telugu_movie_audio_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741280b3-3018-4bad-bd9e-8b59c0ebd5dd/47123049659.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/samsung_galaxy_note_3_lcd_replacement_price_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/josixinexonemo.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_off00010e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 5692 bytes
SHA-256: a615c9fcd997fde928791634d6dd40128e75f9c695a2542c832879f79e9d25f3
font_01_sfnt_off000121d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D2 11112 bytes
SHA-256: b301fe3be1dbb2a3db369c9219ae693a7bb619a0746da8f8be4b459b455e2c12

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