Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6df52ad4d939f3…

MALICIOUS

PDF

72.4 KB Created: 2021-03-12 17:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a120148c2f94a9f5efde3ef6c5e8af SHA-1: d25dc980434f7862149ab4d894b140e074fdd6e1 SHA-256: 9c6df52ad4d939f32e056cb3ef36319f8cd20342a5935123998358e9a7281faa
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://pelibifir.ru/award?keyword=authoritarian+style+of+leadership+pdf', which is likely a lure to trick the user into downloading a payload or providing sensitive information. No scripts were extracted, but the presence of the malicious URL and the high confidence threat detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/award?keyword=authoritarian+style+of+leadership+pdf
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fc6b5c549249.pdf
    • https://cdn-cms.f-static.net/uploads/4403676/normal_6041ff894acc5.pdf
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5fea2957239f6.pdf
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5fe46e5adf10f.pdf
    • https://cdn-cms.f-static.net/uploads/4411512/normal_6024f54b12c77.pdf
    • http://ludibudisiva.iblogger.org/shooting_an_elephant_comprehension_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kinapuxilupore.rf.gd/9391469706.pdf
    • http://dadojusox.epizy.com/ayyappa_harivarasanam_ringtones_free.pdf
    • https://uploads.strikinglycdn.com/files/b27bb5fd-add3-4529-aac6-0edcd6bac11b/sun_joe_pressure_washer_comparison.pdf
    • http://depupumuda.rf.gd/51621632216.pdf
    • http://vefibuvusesusu.rf.gd/simulador_ser_bachiller_2020_gratis.pdf
    • https://uploads.strikinglycdn.com/files/09a2c4e5-ef6f-4621-a953-5f32886ce57f/characters_in_the_book_before_we_were_yours.pdf
    • https://uploads.strikinglycdn.com/files/9dce3171-0c68-4dd1-8a7f-1823804156af/niveles_de_prevencion_de_leavell_y_clark_mapa_conceptual.pdf
    • https://uploads.strikinglycdn.com/files/c52feec2-7db3-4a6b-9cdf-73236bf07eef/house_of_cards_s1e1_script.pdf
    • http://sajumapudetuji.rf.gd/chandrabindu_mon_song_free.pdf
    • https://uploads.strikinglycdn.com/files/b2d0c803-aaab-47bf-af71-3324d965f7ca/how_to_find_the_surface_area_of_different_shapes.pdf
    • http://dudulumunir.epizy.com/tesco_school_uniform_blue_shirts.pdf
    • https://uploads.strikinglycdn.com/files/0b91326f-08dd-49af-a7c7-cc02a3f8d02b/what_time_does_the_stock_market_open_and_close_pacific_time.pdf
    • http://fadanevawil.epizy.com/redafog.pdf
    • https://uploads.strikinglycdn.com/files/193c1e13-7fe7-4160-bc30-86fda0695233/how_to_use_innova_obd2_scanner.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_off0000e0ad.bin
b3fca984aaf9c80da96df73ca47706ba2bec07eacac224df5b41bffb762fe413		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 5220 bytes
font_01_sfnt_off0000f271.bin
8a4e8df32350c5fb101c701bcdf5eac1f7053d525bd7c8dbfc530e541cb839e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 9948 bytes

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