Malicious PDF — malware analysis report

Static analysis result for SHA-256 f564d291c5edc8ba…

MALICIOUS

PDF

92.2 KB Created: 2021-04-02 11:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9242a1bd82b925208aa2a56b1bc9cb30 SHA-1: 6bedb3939b03b330d45bb2a10981052aa3ca67e9 SHA-256: f564d291c5edc8ba1a5472baedc88db35e1234762da54fbb161ab147760eece7
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 a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful site, likely for phishing or to download further malware.

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://midufefew.ru/wix?keyword=hatchet+study+guide+questions
    • https://cdn.sqhk.co/fujotojaxob/d7y5hhX/instagram_login_error.pdf
    • https://cdn.sqhk.co/tagubutapa/gjKaEKB/masterchef_fragman_izle.pdf
    • http://rezltml.xyz/how_full_is_your_bucket_childrens_book9sjfw.pdf
    • http://gladkoe-telo.xyz/foodsaver_v2490_problemsgcoc5.pdf
    • http://nipizakevenuvis.scienceontheweb.net/administering_medications_pharmacology_for_healthcare_professionals.pdf
    • https://static.s123-cdn-static.com/uploads/4483082/normal_5fd08e5da0d7e.pdf
    • http://nibakelenixezas.getenjoyment.net/bearing_number_designation.pdf
    • https://cdn.sqhk.co/woleparos/gnkheGU/viral_video_2020_philippines.pdf
    • https://cdn.sqhk.co/jivumigen/gcjtlw2/verizon_mdm_device_diagnostics.pdf
    • https://cdn-cms.f-static.net/uploads/4465908/normal_6037a152d03a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bojonovaja.rf.gd/bossa_nova_chords_guitar.pdf
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_cd6cb89631ab497687e103370e09a388.pdf?index=true
    • http://febefijawifuja.rf.gd/backup_google_chrome_bookmarks_android.pdf
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_72f1931e6e684e339c4be3890c2d58ce.pdf?index=true
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_93c62c30610b4190bcfd5b7636b47155.pdf?index=true
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_56b9638beb3d442ba80b6e5f928eda4c.pdf?index=true
    • http://nekaxikafixof.epizy.com/39129937284.pdf
    • http://pewavifasovifuz.epizy.com/71516135109.pdf
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_687f7bda83ac416ca404c51551e138a6.pdf?index=true
    • http://menowawonip.rf.gd/87239186701.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f31.bin
4bbb59ffe2d458b3b72e8d2ba57efd72161d017905a02155c62090b23795c55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F31 5144 bytes
font_01_sfnt_off000130a5.bin
84fb20c54ad3e08baae532ee2dac96785e6ac033ae89c0920747a4e8c4f0ea7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130A5 10808 bytes
font_02_sfnt_off0001558b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1558B 4324 bytes

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