Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d76fa59e286e5b1…

MALICIOUS

PDF

87.0 KB Created: 2021-03-28 11:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6d88e2301f54cf51ec7b865a1b5e2e9 SHA-1: b1f0d4a5ae4091989c420a91d8faa07d8c1802a9 SHA-256: 4d76fa59e286e5b1ecf005059e5b725138ecb30f317e04bb027169ea48f99408
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a game manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=curse+of+the+azure+bonds+manual+pdf
    • https://cdn.sqhk.co/guwuweri/5URskJj/iphone_x_wallpaper_yellow_green.pdf
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5ff64cea43023.pdf
    • https://cdn.sqhk.co/zopimoforaja/agdgeSG/paboxatanalipifuwe.pdf
    • https://cdn.sqhk.co/zegofurop/YUzwHhe/vagetekapiseregag.pdf
    • https://cdn-cms.f-static.net/uploads/4403264/normal_601e6159ebbd0.pdf
    • https://cdn.sqhk.co/vunelebu/BPD7Big/92657531172.pdf
    • http://physcoo.com/when_is_half_term_in_england_20193jdk2.pdf
    • http://italdom.fun/masifisusarajusuvuzovcq8a.pdf
    • https://cdn.sqhk.co/sipebililofo/flKKuF7/zodiboderajogibujaz.pdf
    • http://buylettersonline.com/1167694426245er0.pdf
    • https://cdn.sqhk.co/zuxosutuku/33ibiio/anthill_farms_peters_vineyard_pinot_noir_2017.pdf
    • https://cdn.sqhk.co/rafujajek/ijcggid/ghost_rider_wallpaper_cave.pdf
    • http://odemebayisitrafik.com/two_point_hospital_grockle_bay_guideu5pzx.pdf
    • https://cdn.sqhk.co/rizijuwet/6igjl7X/low_poly_color_puzzle_by_number_art_game.pdf
    • https://static.s123-cdn-static.com/uploads/4455914/normal_5fde330c42f1c.pdf
    • http://topuniversityru.fun/51186381883trm4w.pdf
    • https://cdn.sqhk.co/wanuvudeb/jfs1Cig/gakivukuwedupolu.pdf
    • https://cdn.sqhk.co/jepipovi/10jjwje/791757919.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/patilawasu/kdigo_guidelines_defined_aki.pdf
    • https://s3.amazonaws.com/dekogamik/probation_period_form_in_tamil.pdf
    • https://s3.amazonaws.com/tokudapele/annual_business_budget_template_google_sheets.pdf
    • https://s3.amazonaws.com/rujimidujek/wivinijifas.pdf
    • https://s3.amazonaws.com/dikomavomem/cinderella_album_song_free.pdf
    • https://s3.amazonaws.com/jupevuxirapi/maze_runner_book_1_ending_explained.pdf
    • https://s3.amazonaws.com/dozuga/kashala_francis_autopsy_report.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_off0001169d.bin
06628e10227ce8b797dc4ddd69e072967eac6ec7fa1fd414b3991e7baa247902
pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 5376 bytes
font_01_sfnt_off000128b9.bin
fbe432cfd8c4d83afa60decef6de403567727d95886caf1ec7d88e8aafed87b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 11188 bytes