Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e4af0b3d6bad0a…

MALICIOUS

PDF

301.3 KB Created: 2021-04-27 21:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9f4be02de1c33b1aaa10c9bd90e98f65 SHA-1: 57089cbb4cc1c45701514b615b7662ced1dc5394 SHA-256: 81e4af0b3d6bad0a6801d96d0d65fa615838990fb16e2b0a24478201545faab3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9947

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://zajinet.ru/strik?utm_term=what+channel+is+nbc+local+news PDF link annotation
    • http://zumbayuliya.online/the_entertainer_sheet_music_beginnerwjzap.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/jKPpRha/printer_3d_harga.pdfIn PDF document text
    • http://moneyindia.site/pefexepasoduok80w.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/igjeghL/zekuwuzulomamu.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/hgn2fk7/bexefap.pdfIn PDF document text
    • http://ru-payment.casa/vujafimuzmlvdw.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/eidicAJ/descargar_repair_battery_life_pro_apk.pdfIn PDF document text
    • http://lalojit.iblogger.org/online_magazine_maker.pdfIn PDF document text
    • http://hidver.com/69555026611d07ym.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/DV6iagi/boat_driver_license_washington.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/fgcjLgc/mortal_kombat_costume_kid_size_scorpion.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/amazing_grace_violin_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/ejc1hju/superheated_steam_table_si_units.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/haMBhel/58289206203.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/egciiie/jakadepebodex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xisanekaxutup.epizy.com/tinkle_digest_online_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48642929-a48d-4f1e-a234-41f1d8c50967/how_to_make_a_rope_knot_bracelet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71bb51eb-98b7-4fc7-a532-47b10bacebc6/radow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bb1009-d8c9-4fbf-90fc-e01b3194bb00/60160272990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eca9a8-c50c-4e06-a37c-d8d40c0aa376/how_to_get_big_with_resistance_bands.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45477 5036 bytes
SHA-256: b7349dcf170aa1e3d1fad30405e407f96fa0411f8a2ce38f927a24dbb17cd300
font_01_sfnt_off000465b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x465B0 12184 bytes
SHA-256: 9c34e62467902cbb876c42cc1054109f2ec1b8c84c4df579415bf7f5313d2be9
font_02_sfnt_off00048f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F68 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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