Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd958156ba1d652…

MALICIOUS

PDF

92.2 KB Created: 2021-04-01 05:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 66b2fa47fa6f883bea00f8d163ca3eff SHA-1: 89d7fbe9c9e9716a99e1fd4c3c9b9e5db0d68783 SHA-256: 4bd958156ba1d6521beb16d270a54132ee7814bd17a989466e9ed72879ec038e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'golowaki.ru', which is associated with a lure about renewing wedding vows. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=renew+wedding+vows+after+cheating PDF link annotation
    • http://hocostyle.ru/asmaul_husna_melayuld1k6.pdfIn PDF document text
    • http://moitender.org/88283166402d21bo.pdfIn PDF document text
    • http://albatros-trans.ru/78695792961ffjty.pdfIn PDF document text
    • http://gamedv.design/58377036742gn6j4.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/251ab87b-578c-45b3-9b4a-e750f608017a/31473267502.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/sparkle_effect_photoshop_action_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/65229057959.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/how_to_find_exterior_angles_of_a_convex_polygon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df8ce86-23c0-4ebd-9d49-f3c7a7599c22/gun_germs_and_steel_episode_2.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/70719955331.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/career_paths_mechanics_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/solidworks_2017_free_crack.pdfIn PDF document text
    • http://jetupilesoz.epizy.com/biwujigebujejagekufuraxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c49047-ac3f-459b-b003-2ec4203367d6/kelunasaxixota.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/mzansi_afro_pop_beats.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/satituzorufefituxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/noborivaberok.pdfIn PDF document text
    • http://fereralud.epizy.com/install_android_sdk_ubuntu_16.pdfIn PDF document text
    • http://woporebokut.rf.gd/23260502056.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/where_is_the_power_steering_reservoir_on_a_2007_chevy_malibu.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/championship_manager_00_01_free.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/59306091148.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_off00012a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A02 5412 bytes
SHA-256: 1669e1ef301fb3049f76b65ba017bc8d9423e95bb34d9098eb5e0a81fc981ffc
font_01_sfnt_off00013c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8E 10940 bytes
SHA-256: 1c2f6782521d1872d4277f1a52661ed2d8e19a8352990d76247924b2d48deea5

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