Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6fc6542021a3b4…

MALICIOUS

PDF

71.3 KB Created: 2021-03-03 02:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7cd525d166e695e2ab7c010f5c8fbf5a SHA-1: 9f37331f2e40f5b4594fa767cbbc9a2d32e531e4 SHA-256: bc6fc6542021a3b433348b20687fa284cecc52f9d6089bcd9b2bccbb525de2bc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=link%2527s+awakening+guide+book PDF link annotation
    • https://cdn.sqhk.co/zalopubid/fjfiigf/xukavokizetiwekimo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fe407b98e29f.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxazigozo/bhd3cha/classworks_student_login_jps.pdfIn PDF document text
    • http://sokadap.22web.org/age_of_empire_type_android_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/icIxjjY/33237675769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453328/normal_5fdcda7b00b68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5ff35d0d396d6.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/qjbBPjd/66942231116.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/egHhjgf/48950219521.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/rgdFvc6/pc_recorder_app.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/luropi/91839634515.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/worksheet_about_classroom_objects.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/45949448680.pdfIn PDF document text
    • http://purevaxa.epizy.com/gitilure.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/76529064030.pdfIn PDF document text
    • http://fepaseweg.epizy.com/john_deere_7000_planter_history.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_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 5136 bytes
SHA-256: 18b996784769788373758110798897c1195f3344ab445bcbbcd23d03d2969dbb
font_01_sfnt_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 10956 bytes
SHA-256: f80312190255852218c4b041917cfb5078971f088819224e401461b54ad68a90

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