Malicious PDF — malware analysis report

Static analysis result for SHA-256 86201e6769f5e3fd…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 14:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a4a706908320a6eab2edc988130cf1c SHA-1: 578f63ab4c88a1f7af23743c91c4d14dae78ba34 SHA-256: 86201e6769f5e3fd11f71318b3646996c771223c9432b53651bd2c1d9f18c8bd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, suggesting it's part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading further malicious content, likely related to the 'cbse class 12 chemistry textbook solutions pdf' keyword.

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://resalured.ru/award?keyword=cbse+class+12+chemistry+textbook+solutions+pdf
    • https://cdn.sqhk.co/xizubutagen/jaAhejh/88872162178.pdf
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/2854855.pdf
    • http://misiliv.66ghz.com/jafozedigegu.pdf
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/fukifi_renuvobej_rivizunujolisi.pdf
    • https://cdn.sqhk.co/womilepeba/dClNm1o/89197109849.pdf
    • https://cdn.sqhk.co/vumuwuxa/a2QleSN/audio_spectrum_analyzer_app.pdf
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/nesada.pdf
    • https://cdn.sqhk.co/mozoposowi/gdpdjdy/money_saving_tracker_52_week_challenge_printable_5.pdf
    • https://cdn.sqhk.co/nezubanos/b92hhjc/71140624002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tutapaxi/6418227213.pdf
    • http://bozatifove.rf.gd/auriculas_y_ventriculos_del_corazon.pdf
    • https://s3.amazonaws.com/gosete/statistics_and_probability_letters_latex_template.pdf
    • https://s3.amazonaws.com/woberiz/greenbook_research_industry_trends_grit_report.pdf
    • http://mujedofagogi.epizy.com/38515537926.pdf
    • https://uploads.strikinglycdn.com/files/a7307725-ab09-4c0c-9433-ddc5c8f0165d/gegizizamidozarudoki.pdf
    • https://uploads.strikinglycdn.com/files/1340df82-0d40-429a-8c3a-1d61eec2569f/how_to_build_strength_in_your_running.pdf
    • http://nugimuv.rf.gd/10074199394.pdf
    • https://uploads.strikinglycdn.com/files/6d9deb41-41cb-45bf-8a7b-f86d38d796b3/memijo.pdf
    • http://bofisul.rf.gd/ai_is_the_next_phase_of_human_evolution.pdf
    • https://uploads.strikinglycdn.com/files/28ad9c5e-dcf6-45de-8c47-f00dc3238e67/verifying_trig_identities_quiz_answers.pdf
    • https://uploads.strikinglycdn.com/files/e3098ad9-777d-4886-84f6-fb944a82c986/what_is_rule_in_math.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55d.bin
c6ccd99352a824837b79e875298483f10c5c975a34d91830a57f632976faf1ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 5856 bytes
font_01_sfnt_off0001092e.bin
bba33e2e1553883cdac038b639ada270c9f9595428c796eb099a6bc6a9e6e361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1092E 10856 bytes

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