Malicious PDF — malware analysis report

Static analysis result for SHA-256 341a2da758e2b468…

MALICIOUS

PDF

78.1 KB Created: 2021-03-06 16:01:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fc50acf01bc2b42a881fbf3dbd83d7a SHA-1: e8b3ea888259aa070ce5c938f6e8788bb7c62347 SHA-256: 341a2da758e2b468b3c83f8c9c14e0683549f8d33daf304497e15eb74107a8e3
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, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this, flagging the file as malicious. The document body, though heavily obfuscated, appears to be a lure related to semiconductor physics, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/award?keyword=distinguish+between+n+type+and+p+type+semiconductor+on+the+basis+of+energy+band+diagram
    • http://totalcreditreport.info/68699016746a7cx.pdf
    • http://gepavozo.mygamesonline.org/how_to_fix_a_ge_oven_microwave.pdf
    • http://pedrons.space/49581140742ep495.pdf
    • http://itfamily.info/frontier_fios_tv_channel_lineup_florida480uq.pdf
    • http://shoop-fn.ru/22080015480o5v3p.pdf
    • http://fupefabesosada.mygamesonline.org/name_change_ontario_social_insurance_number.pdf
    • https://cdn.sqhk.co/pepupiribojo/iiwGidF/davepopogutivudu.pdf
    • https://cdn.sqhk.co/xataruzepape/hhhhjQI/latest_samsung_galaxy_s9_ringtone_download_mp3.pdf
    • http://freshnatur.fun/what_are_metric_system_measurements230yr.pdf
    • http://buytoday.cc/is_schweser_notes_enough_for_cfa_level_1n0j4z.pdf
    • http://tumbaa.space/airlines_manager_2_tycoon_guidev75m3.pdf
    • http://nijikelax.22web.org/87117412303.pdf
    • https://cdn.sqhk.co/xadowififux/6jjoOfh/jevirop.pdf
    • https://cdn.sqhk.co/jisokemefaz/jijblgc/mogimidotuxaka.pdf
    • https://cdn.sqhk.co/busosuwik/UQlgR3y/best_wood_for_carving_in_new_zealand.pdf
    • http://volosaty100.xyz/vampire_academy_6_free_downloadtsy6k.pdf
    • http://hydraruzxpnew4af.exchange/what_are_the_prophetic_numbers0671c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_edb99125a2d946b7b9244ad6f8a93595.pdf?index=true
    • http://gelutusuxipedib.rf.gd/best_uses_of_true_polymorph.pdf
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_2cf3e3fff55547e5861aa6dc56b030d7.pdf?index=true
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_2984cf42738a4272b4ac91332c68cbe3.pdf?index=true
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_5092a753fe474f5ea4736d64bac25ed7.pdf?index=true
    • http://borobosen.rf.gd/boating_license_florida_study_guide.pdf
    • http://nijesawojate.epizy.com/60267377789.pdf
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_b2c8247732994bfa8636f097ac9b00f3.pdf?index=true
    • 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_off0000f32e.bin
6dae4453a61418c41bff9fdac130fbf3c630af4ec6c12fd2f31316dcb2b3927c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 5868 bytes
font_01_sfnt_off00010717.bin
bd0d6fb2f99296929f917c5465f96d708e0b721fc7eb6060e351ccbabc947237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10717 10092 bytes

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