Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b16f3693b7be0df…

MALICIOUS

PDF

74.4 KB Created: 2021-03-27 10:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c834c3dcc51182ab7187c7e7e6f3f39 SHA-1: 2cdfb660dd44cb6c8d21e41c2659ad3cc94bb5c6 SHA-256: 9b16f3693b7be0df70cc158a38311a7c31ac5f53ef09a631c971706a9121581d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is also listed as a high-risk URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=list+of+suffixes+and+their+meanings+pdf
    • http://tramlaweq.online/real_estate_classes_near_me_costnqeet.pdf
    • http://loveantravel.xyz/video_karaoke_bandungank3mqp.pdf
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fce7112ea923.pdf
    • http://beviluxenumiliv.mywebcommunity.org/2908970004.pdf
    • http://getveran.site/bharatanatyam_adavus_with_music_freetd0jq.pdf
    • https://static.s123-cdn-static.com/uploads/4457843/normal_5fcb22491f778.pdf
    • http://potolkilife.ru/armageddon_gear_game_changer_rear_bag72q4x.pdf
    • http://bukobaxaz.getenjoyment.net/bank_po_books_download.pdf
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fcd407440c75.pdf
    • https://cdn-cms.f-static.net/uploads/4465006/normal_600e9953b0144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ed1edcb3-f66b-4dc7-8286-cfaf57228b0f/30874133493.pdf
    • https://s3.amazonaws.com/mavixu/xesaxureguru.pdf
    • https://uploads.strikinglycdn.com/files/f850bb3d-165f-47de-ba71-f8e45668ced4/hoover_dual_power_max_carpet_washer_fh51000_manual.pdf
    • https://uploads.strikinglycdn.com/files/c128963b-05ab-4d33-b0b4-f6ac2529bcb5/arma_virumque_cano_poesia_latina.pdf
    • https://s3.amazonaws.com/zobuwubedak/75740391311.pdf
    • https://uploads.strikinglycdn.com/files/a79fd7b6-635a-4030-93ab-c0d24616bc75/pilidunesidekijudejo.pdf
    • http://woxesizefibugel.atwebpages.com/berliner_platz_3_neu_vk.pdf
    • https://uploads.strikinglycdn.com/files/4c45779e-7765-4bca-aea0-d3371ed08c4a/38978210038.pdf
    • https://s3.amazonaws.com/kijelopazekune/joomla_template_403_error.pdf
    • https://uploads.strikinglycdn.com/files/c726b7d7-3b3f-42c9-b73e-723e6a583718/how_to_make_a_letter_of_intent_for_business.pdf
    • https://uploads.strikinglycdn.com/files/73e66e8f-885f-4382-ab1c-c26a2356a1a8/the_bedford_researcher_5th_edition_free.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_off0000e5fe.bin
71bbc3e56a4db7254079a3d8c48e4b0a568523e80e5185ca8a15100d1308607d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 5432 bytes
font_01_sfnt_off0000f859.bin
9832860dbddd2026909df61c4eb8b3a72e1e61a3054aa27c5f9feb70366baa10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 10544 bytes

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