Malicious PDF — malware analysis report

Static analysis result for SHA-256 decf65e6dcab0810…

MALICIOUS

PDF

73.6 KB Created: 2021-04-20 00:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df49a82f7a959405c82b040c0b06d5a SHA-1: bff315e7c974c36b7d31d08d699dbcf11d9627ff SHA-256: decf65e6dcab081032d2e30f58bd93ef2b47f99abef31469bb19938c177b6835
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to educational worksheets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=properties+of+addition+worksheets+2nd+grade
    • https://cdn.sqhk.co/nuzitomizaj/jV9dhg3/midge_fly_larvae_australia.pdf
    • http://valigulepi.scienceontheweb.net/kawuk.pdf
    • https://cdn.sqhk.co/wizokawoxo/Zjjhhgf/vintage_auto_auctions_near_me.pdf
    • http://baboguzaxeleju.mypressonline.com/problems_of_agriculture_in_africa.pdf
    • http://winovigamaj.mygamesonline.org/dusotumam.pdf
    • https://cdn.sqhk.co/sugigevapure/VcVzYgi/ric_freeman_attorney_tyler.pdf
    • http://fakutuzogazu.sportsontheweb.net/walokamamoso.pdf
    • https://cdn.sqhk.co/mevazasid/hfKmhcx/ginorumopik.pdf
    • https://cdn.sqhk.co/mexovaru/gj5Djj2/toxamelajunexuzokaj.pdf
    • https://cdn-cms.f-static.net/uploads/4404755/normal_60147f6d3e593.pdf
    • http://nosixavol.sportsontheweb.net/92858619915.pdf
    • http://tinesemexogo.mygamesonline.org/tetozukabu.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_60567ad11ca57.pdf
    • https://cdn-cms.f-static.net/uploads/4475376/normal_600a0806f232e.pdf
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6066636f0542a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pogetowem.onlinewebshop.net/84167960392.pdf
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_1e9db70a8a2344968f5dce4db7ba60e5.pdf?index=true
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_d1c66efa67f943f9af3c9f8348033ae7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e51a3263-2562-45eb-a33e-afd17ad94599/90998082920.pdf
    • https://93a2b5bb-aecd-41dc-861f-07dcdefec443.filesusr.com/ugd/dee83c_698c843723694edf951747d22dc31e80.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58a4178b-9e3c-408a-ba12-beb145ce9698/vampire_diaries_season_1_cast_emily.pdf
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_255d5c1a0a7b43e8a5b2654767d142d9.pdf?index=true
    • http://zalatikewal.atwebpages.com/bsc_1st_year_botany_books_download.pdf
    • https://uploads.strikinglycdn.com/files/92c21642-3f32-4a80-9a67-ec39807ff0f2/siruvukozorafizimubi.pdf
    • https://uploads.strikinglycdn.com/files/121a88ab-377b-4d4c-8c6f-bb7f0d0de577/gurps_4e_spaceships.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_off0000e188.bin
26ebc0e8a1f322169688aa8e2876674c16b755033d6bcf410b71b790d5976e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 5560 bytes
font_01_sfnt_off0000f48d.bin
0bebd411b3cacb1f2046a6851aa8d9b28f12bb9eb498d7749b4bcfde46c18d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 10632 bytes

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