Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a93bfe9d664a664…

MALICIOUS

PDF

106.8 KB Created: 2021-04-15 23:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 12a5923036e949afa714671084c6ce0a SHA-1: a2b9d32b2d30ff28fb908b0dab8e089163a78465 SHA-256: 8a93bfe9d664a6642432b83f219af93ecb31b702018bec7a835d2ae9b8a67ed7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'rocking horse winner'. No scripts were extracted, but the presence of external URIs and the overall malicious classification suggest an attempt to compromise the user.

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://zajinet.ru/strik?utm_term=what+is+the+rocking+horse+winner+really+about PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5ff014529118b.pdfIn PDF document text
    • http://sayfelengs.space/commercial_loan_commitment_letter_templatedqjwv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_6029ee5ecde79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_600d436e09317.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/ijakGgc/screencast_o_matic_pro_free_download_full_version.pdfIn PDF document text
    • http://ru-dev.xyz/windows_10_to_android_file_transfer_wifiobp46.pdfIn PDF document text
    • http://topcreditreport.info/husqvarna_372xp_x_torqj6nk7.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/YidEgiK/music_id_for_roblox_wap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_6043126cb77eb.pdfIn PDF document text
    • http://leyloften.online/temperate_forest_biotic_factorsob29a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/35786898523.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/vivab.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/2013_dodge_avenger_sxt_interior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e7d86e-6d55-4883-8b64-a1dedf5135ab/11548869187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4492742e-d66c-4226-a150-3e42b3a99fcd/how_do_you_cook_hard_boiled_eggs_in_a_dash_egg_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/introducing_spring_framework_a_primer.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/how_to_apply_pellon_987f_fusible_fleece.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/shark_ion_robot_vacuum_r85_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664eb391-a018-4452-85f5-fc6aaad6370a/can_you_watch_marvel_movies_on_disney_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/fanemulitexugagikosozile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379c3c35-a70e-460c-8f2d-234d4dd65c93/cottage_food_law_california_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b31e6fc-539a-4920-a6db-76fcbb133aab/iliad_and_odyssey_main_characters.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_off0001664c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1664C 5472 bytes
SHA-256: 6c4e072aa5e23cb3ca02f2af59dc237cac0da60e3dc6a8b04c6f1ebca0408dc6
font_01_sfnt_off00017901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17901 10220 bytes
SHA-256: c136ae31f815c45578250eadc5abd9fb8368a75ea4e31b564f626c4f99c8cc65

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