Malicious PDF — malware analysis report

Static analysis result for SHA-256 71eb294bc775f68d…

MALICIOUS

PDF

95.4 KB Created: 2021-04-29 22:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f526dda0a5b4162f0e7fa5093d388f01 SHA-1: 4a13a2853227ff5e7bee60c5609bfc6ab1b67926 SHA-256: 71eb294bc775f68d07f733ec73407266612c6e30ec50688e06927c936916b9f2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick users into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=cuisinart+bread+maker+cbk-110+review PDF link annotation
    • http://wusator.mygamesonline.org/mutiwonevujumaxonewimo.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/capacity_utilization_in_manufacturing_industry.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/jJrhjie/83258301817.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/iegdTKj/duzawipuxunazeko.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/gimeregela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/mesudoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2a1183-1c29-4b75-9e60-aebff8558950/dyson_ball_vacuum_spare_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a407b4b4-17f8-417e-8732-c3d7c5dcbf6c/mysterious_benedict_society_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a64623-9581-41a3-ae2f-87dc720ffc71/11288134034.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/job_verification_letter_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4cfd3c-3e78-4dae-afd7-015b3632868d/81757236797.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/zombie_catchers_apk_hack_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd20a2f-ddc6-4284-a8e9-78d09cedc128/manual_teclado_casio_ctk_5000_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52d7b15-b7ad-4775-a0b7-8ffee03a086b/pukonapezalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd773677-609a-4cc9-8c66-f91214e1e458/gilosurefarovodu.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/bobusotakitelibitilonog.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/bdo_mobile_english_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/bowen_island_trail_map.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/92921610680.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/deep_purple_piano_sheet_music.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 5540 bytes
SHA-256: db7de936c2e12174eae78b43172f2712f2ec7ee35f2b744724a41b6a72729442
font_01_sfnt_off00011a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A26 13816 bytes
SHA-256: 22c25a13332eb5a86bfa695fa6fba4ad9c2dd09226582abad75e69f2bbe5584a
font_02_sfnt_off0001491c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491C 16432 bytes
SHA-256: 51e886db98869ec3f0fc4c4486a1393ac961524d0defa984f3d379e41fdc474a
font_03_sfnt_off00015f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F40 6048 bytes
SHA-256: c215f25855dcbd68ecbdc9c7835efdcf5321c39328f688b0e7b9ba4f3087a6fd

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