Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b47ed04958ea65…

MALICIOUS

PDF

77.9 KB Created: 2021-03-10 13:26:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c08dfe553d5798382b98e1cf76fd9d6 SHA-1: 15f1f57224e4c69554488c78b200a7995a571c8d SHA-256: b7b47ed04958ea65a25b3b0d7238829e8c9b2a5bd77642dd5cff138ff55d5c35
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a malicious browser extension or update. The embedded URL 'https://maypoin.ru/award?keyword=affiliate+marketing+without+a+website+pdf' is likely part of this social engineering attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://maypoin.ru/award?keyword=affiliate+marketing+without+a+website+pdf
    • http://app-3null.com/facebook_analysis_report_morningstar399iy.pdf
    • http://giwosoto.sportsontheweb.net/65164481604.pdf
    • https://cdn.sqhk.co/zotiperugi/5Jgd7hf/spongebob_kart_racers_xbox_one.pdf
    • https://static.s123-cdn-static.com/uploads/4386361/normal_5fcfe7c3f2e32.pdf
    • http://ladiluvame.mypressonline.com/what_is_the_average_value_of_f_on_1_6.pdf
    • https://cdn.sqhk.co/fukaxaxod/ig1jVds/55676008915.pdf
    • http://boost-shop.xyz/highland_cathedral_sheet_music_organ_free0oa4s.pdf
    • https://cdn.sqhk.co/metexemoraga/iblXgeJ/word_trip_level_367.pdf
    • http://larokamexi.sportsontheweb.net/fipipagefurojogajesen.pdf
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/e4fd32730ffd45.pdf
    • https://cdn-cms.f-static.net/uploads/4418791/normal_603be1cc136bb.pdf
    • https://cdn.sqhk.co/lawafopugu/e4MigCI/razodosatizomolutunusu.pdf
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fc72568e90d1.pdf
    • http://profibrend.ru/xosavalip0m652.pdf
    • https://kunuxuzuvedenax.weebly.com/uploads/1/3/6/0/136051690/27a9d343.pdf
    • http://acupofjacob.com/bemitijokifefokukarrqd5s.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ranitirunom.myartsonline.com/principles_of_electric_circuits_10th_edition_answer_key.pdf
    • https://s3.amazonaws.com/bajapovogam/educational_psychology_quiz_answers.pdf
    • https://s3.amazonaws.com/wifiduxezo/31120082975.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e468.bin
561250b308c4d44599e49c72b5e784f9a27a34b976a09c5fb783db78ba492948		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 5624 bytes
font_01_sfnt_off0000f75e.bin
de619168c1dd0f8a47605ebd07324d748932854d6fa4b6b987ad2ba7284164f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 10644 bytes
font_02_sfnt_off00011bd7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 4324 bytes

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