Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07c71459a36f12d…

MALICIOUS

PDF

81.7 KB Created: 2021-03-23 22:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97478d8339cdb2705927f1303911c4d5 SHA-1: 7e6821dd486c0e52c710f87cb6088e5a88e37df6 SHA-256: a07c71459a36f12dc41c949f77a6800dda7b86daa766ec22440693aaa2e5b2bf
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded external URI and is flagged by a machine learning classifier and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to French grammar, directing users to the URL https://ponafet.ru/strik. This URL is likely used to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://ponafet.ru/strik?utm_term=how+to+use+demonstrative+adjectives+in+french
    • https://cdn.sqhk.co/rapovebakeb/tghA0Ey/radio_galaxia_la_picosa_88._5_en_linea.pdf
    • http://artdebug.site/singular_and_plural_nouns_worksheet_for_3rd_gradenih0u.pdf
    • http://pawomodom.medianewsonline.com/54992966897.pdf
    • http://farozemirig.scienceontheweb.net/wubutoridoziresidipijek.pdf
    • https://cdn.sqhk.co/ritasuxa/jjidSjj/dice_drinking_games.pdf
    • https://cdn-cms.f-static.net/uploads/4412174/normal_601d2368beecf.pdf
    • http://tufodudem.mypressonline.com/49245540768.pdf
    • http://medicalpracticementor.com/sarirexb6t1.pdf
    • https://cdn.sqhk.co/wixexozesila/djdjfhe/1532964127.pdf
    • https://cdn.sqhk.co/jufebarur/1DnOdgh/action_hero_biju_movie_actors_name.pdf
    • http://naykaryadom.fun/65553437815bxmr9.pdf
    • https://static.s123-cdn-static.com/uploads/4412573/normal_60070c65dbb53.pdf
    • https://cdn-cms.f-static.net/uploads/4480397/normal_6031f5e40575e.pdf
    • http://vatidenow.medianewsonline.com/kitchenaid_gas_range_with_double_oven.pdf
    • http://creamwalls.space/49471050833xx6be.pdf
    • https://cdn-cms.f-static.net/uploads/4481988/normal_604029d417a4a.pdf
    • https://cdn.sqhk.co/wapevenupu/ijjgiie/glory_of_generals2_ace_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4380088/normal_6037329e3541f.pdf
    • http://goromeo.club/55105185774w0etj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4c285a73-56fa-423f-b75d-d4e460c0ec73/94182346280.pdf
    • https://uploads.strikinglycdn.com/files/71c2d6a7-b95d-45ba-9ec4-0a477d224043/honda_generator_parts_and_accessories_near_me.pdf
    • https://uploads.strikinglycdn.com/files/0dd7ed2a-149f-47e2-a30d-437a973e896c/sepubunel.pdf
    • https://uploads.strikinglycdn.com/files/d78201a4-9faa-4ba3-9dc2-ffed928953ec/how_to_draw_realistic_portraits_with_pencil.pdf
    • https://uploads.strikinglycdn.com/files/26366738-1186-4e9a-b5ad-c69d9294d8d0/identify_parallel_and_perpendicular_lines_tes.pdf
    • https://uploads.strikinglycdn.com/files/d01d040c-1db4-484b-8f66-0050a1b20dc5/77133707401.pdf
    • https://uploads.strikinglycdn.com/files/228ac5ae-2f1d-44f5-8fbe-ddf66e80e8ad/where_do_reactive_oxygen_species_come_from.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_off0000f134.bin
5300ed0970697b758e7213d887cd88d5f976c9d0d957d374e203b34102a78c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 5300 bytes
font_01_sfnt_off0001031d.bin
3a1aca01cfc0acdd5b8c3d82a4fbed4fecbd3de043b2e1c970acce7e786fedd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 11768 bytes
font_02_sfnt_off000128fa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128FA 4324 bytes

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