Malicious PDF — malware analysis report

Static analysis result for SHA-256 9885891ffccc55a6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-27 20:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7243f65d1418896ed08941995b61e56b SHA-1: 996c4c87f5a67c948f67ad99f9f1abfd2edc0f02 SHA-256: 9885891ffccc55a6a8238dd75ae277300d9686994f5627cc955c00bc72cd29ae
96 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with the primary one being `https://jumiwimov.ru/strik?utm_term=what+to+do+when+washing+machine+won%2527t+spin`. This URL, along with others, suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://jumiwimov.ru/strik?utm_term=what+to+do+when+washing+machine+won%2527t+spin
    • http://betmoy54.com/what_is_expense_reimbursement_revenue_in_real_estatejfowv.pdf
    • https://cdn.sqhk.co/wexunaveb/aqXIib5/iken_learning_app_download_for_pc.pdf
    • https://cdn.sqhk.co/pubodegosog/ZicjaXp/my_chicken_virtual_pet_game_mod_apk.pdf
    • http://collegegraduatecentraldating.com/88625954710nuymg.pdf
    • https://cdn.sqhk.co/datolabevev/gFigcgf/nevefutobu.pdf
    • https://cdn.sqhk.co/miropefaneka/Ujea5wX/barbie_makeup_games_for_computer.pdf
    • http://helplnstagramcontact6088758.com/rugelepoppfcx.pdf
    • http://study-english-05.site/logunezeverapanegifufisc9qor.pdf
    • http://ufenmac.com/does_burger_king_only_serve_breakfast_in_the_morningupl1c.pdf
    • http://contact-git.top/goat_simulator_xbox_one_amazon4ajmz.pdf
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fda8e5d4bcf9.pdf
    • https://cdn-cms.f-static.net/uploads/4420589/normal_6045fb79926d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/luramamelolem/98123926174.pdf
    • https://s3.amazonaws.com/zidosozawok/97_f250_7.3_transmission_fluid_capacity.pdf
    • https://s3.amazonaws.com/divelatoxa/vampire_diaries_season_1_episode_10.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_off0000e02b.bin
0861420a9abd229f2af59e9c4b69a32675ddd424e5c6660d4586cd7f6d4c6e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 5500 bytes
font_01_sfnt_off0000f2e1.bin
8e4ae4ba3cfdffe8c28742e491e8b300cfa127f68d31a9a545f3b8d0a652262e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 10648 bytes

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