Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce51d3f19b6c644d…

MALICIOUS

PDF

64.0 KB Created: 2021-02-17 12:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 424f83d20a4d1b0a73f94f19b28d8b6a SHA-1: 8728c09b143cba5dd73e44c0c8cb9d6592f142d1 SHA-256: ce51d3f19b6c644d630d4dfbd93c57aa70cbc158a97b7cdbe2b3c4eb4b216920
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'jottigo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document, likely as part of a spearphishing campaign.

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://jottigo.ru/wix?keyword=tom+clark+motorsports PDF link annotation
    • https://cdn.sqhk.co/muligumixe/jihhijP/minecraft_mods_1._16._14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_602cd76463981.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/gc1icye/96612725573.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/ZifwtQa/happy_shots_golf_level_122.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/djahcpi/ant_farms_for_sale_melbourne.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418972/normal_5ffcd708d3f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5fd26147579dd.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/cs7gdWt/81661613167.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/KlrJjhF/37270397497.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/jiicdha/88504975865.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/zijivevip/answer_me_jesus_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/cheat_codes_of_gta_3_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/53579176946.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/bmw_m3_gtr_wallpaper.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_off0000bfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA8 5092 bytes
SHA-256: 877ac89bad3d474ea7b1dc7c07c3aa594f4cc781251f617fb22c9450b6c5b4ee
font_01_sfnt_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 10116 bytes
SHA-256: 473480f03c102aa21323aea05ba97d34666648e36647e22a82c927b1f74a2ed6

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