Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f01fed283ae32b…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 19:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e5f18e2d4f418181afff2904d8c2916f SHA-1: c2b043d23857b18596a585059701927b7820c90d SHA-256: d8f01fed283ae32b7aab208921211d6b063befc7f49a4f34cb9f4dcbee49ba6c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to academic content, which is a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=homeostasis+worksheet+answers+positive+and+negative+feedback PDF link annotation
    • http://giveaway2020.info/bejiwikaposivapugosems90g.pdfIn PDF document text
    • http://ru-1.casa/how_to_start_with_html50x5pe.pdfIn PDF document text
    • http://cmbespaceclient.xyz/everyday_use_alice_walker_questions4tbr4.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/ighahe8/shark_ion_robot_reviews_dog_hair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_60384d671859b.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/hjNhfCH/football_heroes_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_603c5fa4da89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_5fe9d69dac2a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5ffd0da02b2e0.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/Yggcihl/chronoblade_mod_apk_offline.pdfIn PDF document text
    • http://vezerfa.xyz/cantina_band_sheet_music_pianoxopjk.pdfIn PDF document text
    • http://libralab.digital/how_to_remove_lg_washing_machine_agitatorld12e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d65cf40-56c2-45c8-a870-07db9afa8fe1/2019_can_am_spyder_f3_limited_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06515a5e-2ee8-412b-8f92-02278fd2686a/47845602457.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/adventure_games_dedomil._net.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/28573904541.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/32488610321.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/interior_angles_of_polygons_worksheet_tes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5368e9-7166-4007-b4ea-3632e0f90c52/sazive.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/canon_pixma_ip90_driver_mac_os_x.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/mutaciones_genticas_brca1_y_brca2.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 5856 bytes
SHA-256: ddaedca1c29fd15da2c19688a77111deeb116be17ca2e9138b34baf2fc0b95fd
font_01_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 10468 bytes
SHA-256: 23dce7734648b412caa33a9f7d17c3ae28734148e66e5e307a950b8e5a7e8a01

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