Malicious PDF — malware analysis report

Static analysis result for SHA-256 54104244235cfb6f…

MALICIOUS

PDF

70.3 KB Created: 2021-03-25 11:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a3ca11f95bbc0a580cc072c3874399b4 SHA-1: b3e3413037bfa3ce414c6309f465eca7044fb6de SHA-256: 54104244235cfb6f30cdfe5221634241b76cc4dd73f492cb7a0f5d1fb8713bb9
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'botokaw.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a technical document lure.

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://botokaw.ru/123?utm_term=astm+sheet+metal+thickness+tolerance+chart PDF link annotation
    • https://cdn.sqhk.co/difejekexe/id1oxif/71159268314.pdfIn PDF document text
    • http://copyrightshelpcenter.com/kasilitigirobovo7bead.pdfIn PDF document text
    • https://cdn.sqhk.co/nofatazor/hghfjgg/buick_enclave_2008_manual.pdfIn PDF document text
    • http://dorightunion.com/air_traffic_controller_online_programspx022.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/OgijjV3/pewekagakufifedulo.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/uUBEigu/amazon_kindle_free_books_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/ciifhbh/world_history_for_us_all_big_era_1.pdfIn PDF document text
    • https://cdn.sqhk.co/naxenunovus/irpjhie/recette_sandwich_thon_mayonnaise.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/ZQhcTii/fejos.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/Cx1jfgf/elements_of_art_color_kqed_arts.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/ibhgijC/nhl_hockey_playoffs_tv_schedule.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/d3f53266-a47e-4e6e-b2c5-a118781a5611/brandon_lee_age_when_bruce_lee_died.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/76911812113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76198c6-8990-4368-abb9-dd9840aa158d/xirarinowukomewoselixowe.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/b._ed_form_2018_du.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d288c4-2f24-4684-95a0-0eadcf00b580/fawabavovexenexifogozuvi.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_off0000d254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 5092 bytes
SHA-256: f6b3729b83a33ae638eb3081d896b0f488a61587e1863812bc765ccfcba8fa0b
font_01_sfnt_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 11428 bytes
SHA-256: afd584a1dff2989efbdd18c5875324da8d1d3f3b0632d9d8f609227386cd0d90

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