Malicious PDF — malware analysis report

Static analysis result for SHA-256 51722cf7eb861f68…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 23:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d3296cc7b185489ddb885b205714b29 SHA-1: 74513b637853aeb53a5b9459a34b33716e85ad56 SHA-256: 51722cf7eb861f681c4bf1ee21f602f44e0d373ae53ab9b8d9e8a01cc43c2b80
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/wix?keyword=algebra+1+chapter+2+answers PDF link annotation
    • http://pabulaluxe.iblogger.org/hp_pavilion_27xw_vesa_mount.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/changeling_the_dreaming_2nd_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/DjiLgha/kode500ess_parts_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/gulidepiz/ihiRghf/logubamopojowazir.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/phenomenological_approaches_in_landscape_archaeology.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/hcicgis/best_bet_shows_2019.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/rujimidujek/13005162535.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/xenumeriwejumavobi.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/sentry_1250_safe_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/world_war_1_trench_warfare_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/cisco_switch_sg350x_datasheet.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/what_is_the_best_hearing_aid_battery_size_312.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/hssc_clerk_exam_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/4g_lte_signal_booster_apkpure.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/online_autocad_to_converter_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/zenitaxadogepetimob.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/54157477741.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/christmas_worksheets_for_kindergarten_pinterest.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/18446835681.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD244 5232 bytes
SHA-256: 07dc4728e29d51de2919491c8e22adaaf56f0c8c5f7b5264a1b49b748b6f50ba
font_01_sfnt_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 10460 bytes
SHA-256: 3bdf64f837958c4ced9d00d647f1e9a93148b92013e62b6656068601d7eac958
font_02_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 16112 bytes
SHA-256: 62b559721a6967c5225c022894fd12f25c9dfad26b1ecba2375fced28481320e
font_03_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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