Malicious PDF — malware analysis report

Static analysis result for SHA-256 c749af0567a93d5a…

MALICIOUS

PDF

67.5 KB Created: 2021-03-13 19:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 145635dd2cd5a98cd567e5e2792e81d1 SHA-1: 77edea2f22eaafb78d94f9d412e37b6255a9bbe5 SHA-256: c749af0567a93d5a00ef66a766a002c1fbaa1bad0d4d10062f5ebcdd3a57d4f2
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 'https://kuzutuzo.ru/award?keyword=genetics+instant+notes+pdf', which is likely a phishing lure disguised as 'Genetics instant notes pdf'. The PDF structure and content suggest it's designed to trick users into visiting this external link, potentially to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=genetics+instant+notes+pdf
    • http://shoop-fm.ru/noxame74vqu.pdf
    • http://my-favshopd.online/yamaha_hs8_subwoofer_for_sale30ks1.pdf
    • http://leafester.online/fubebufotejotkx1j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://susebuxusebug.epizy.com/candy_crush_soda_saga_apple.pdf
    • https://uploads.strikinglycdn.com/files/f49fdfeb-e0c0-4d27-a74c-efd0f9b232ab/13373494436.pdf
    • https://uploads.strikinglycdn.com/files/ed579f6c-e4aa-4b20-a54e-d3e1c4b0c017/captain_underpants_full_movie_free_download_in_hindi.pdf
    • http://wilesodirax.epizy.com/moloweno.pdf
    • https://uploads.strikinglycdn.com/files/6b8601d5-21f6-4e43-8246-0e05f8a3b102/wujozosasujejiduveja.pdf
    • https://uploads.strikinglycdn.com/files/ff50334b-8e2f-4471-abb1-ad6c9eed821b/komeratugupo.pdf
    • https://s3.amazonaws.com/tiluwisulepam/xizaxuwozu.pdf
    • https://uploads.strikinglycdn.com/files/6ec05a18-e4cf-4854-87ab-0a751efab1fa/how_to_program_charter_remote_ur4u-mdvr-chd2.pdf
    • http://bibesatu.epizy.com/how_to_install_graco_contender_65_front_facing.pdf
    • https://uploads.strikinglycdn.com/files/e6acfd03-afb0-48cb-a1cc-e40b5c70a13d/how_to_calculate_z_star_statistics.pdf
    • https://uploads.strikinglycdn.com/files/ab1a7817-7550-4df1-ae97-f2c2bae841cb/85736818063.pdf
    • https://uploads.strikinglycdn.com/files/9f1dfd18-b264-49b6-9ffc-ca8ce01ea1b2/is_disneyland_staying_closed_until_2021.pdf
    • http://xupafokivudaked.rf.gd/ford_expedition_2021_release_date.pdf
    • https://uploads.strikinglycdn.com/files/6d9a0c58-0bc0-4ef1-83e2-277d547390d4/where_to_learn_riding_in_orgrimmar.pdf
    • https://uploads.strikinglycdn.com/files/33557b00-8135-44ed-98d1-2d01bdf31ba7/relulilino.pdf
    • https://s3.amazonaws.com/lovomijelun/rexodoniwazapolasuka.pdf
    • https://uploads.strikinglycdn.com/files/1b0547a2-1207-4f68-8fc6-338b67e9b709/how_not_to_stop.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_off0000cc4e.bin
b81086566b1f0d4ee518e497f08ea33a3b162f3ef9390213833590021bfe4e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4E 5052 bytes
font_01_sfnt_off0000dd9c.bin
af9c2c3a45649be135570d847e86c2ebaad7595f7d1d7ecbcc39898284e0a376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 9896 bytes

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