Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f6921039a8311e…

MALICIOUS

PDF

143.7 KB Created: 2021-03-15 06:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f3c5da33a503d608b2feeb17e1deec SHA-1: 7aad63568dd6cec05e3ad1b2d967922343dc655a SHA-256: 62f6921039a8311e488d355040e2705a23ac54b8c22b9f1af58d941f64ddb636
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that, when visited, appears to be a search result page for 'wilkins jr high twitter', likely a lure to disguise malicious intent. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

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://leonvi.ru/wix?keyword=wilkins+jr+high+twitter
    • http://jefigesawek.iblogger.org/acute_tubular_necrosis.pdf
    • http://gapefagobusiwak.iblogger.org/gopal_ranjan_soil_mechanics_book_download.pdf
    • http://wersita.fun/savage_worlds_feuille_de_personnageikv6m.pdf
    • http://ig-support-service.com/sengoku_basara_2_pc_highly_compressedp429g.pdf
    • http://twirlini.com/8646513847oe3r7.pdf
    • http://grinallex.shop/pubofedinukupcu04u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ea83d2d-aa53-42f6-99ae-8a26c01f52cb/dujigovalovazedatid.pdf
    • http://burisaxaz.rf.gd/karcher_pressure_washer_1800_psi_manual.pdf
    • https://uploads.strikinglycdn.com/files/0c8db2cb-90cf-436d-82a2-de415f6154a6/249215347.pdf
    • http://wolawozel.epizy.com/vedapuxitukawiwu.pdf
    • https://uploads.strikinglycdn.com/files/dabb5f42-b6f6-4202-9d06-b553e29354e3/troy_bilt_string_trimmer_accessories.pdf
    • https://uploads.strikinglycdn.com/files/a0c872e7-98b1-4ba4-b3d8-d89277c496c5/puwogesujinofulu.pdf
    • https://uploads.strikinglycdn.com/files/19d3e106-598e-45db-b527-09c730602a26/25360963193.pdf
    • https://uploads.strikinglycdn.com/files/b752a911-a0a8-4bd4-89cd-d2d831d7ab5e/attack_on_titan_game_ps4_release_date.pdf
    • http://roxudafemif.epizy.com/how_to_make_demi_permanent_dye_fade.pdf
    • https://uploads.strikinglycdn.com/files/a7f636ca-74c0-4add-b612-9177a3dc8af3/xazopesolexokirore.pdf
    • https://uploads.strikinglycdn.com/files/232671c3-6487-4b80-b192-fa1e7fa2fda2/koregu.pdf
    • http://tepokubomime.rf.gd/mit_app_inventor_2_for_pc.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_off0001f8b4.bin
697e037dd90cafd3ec0aa88e27af8c7da2b56848d5473787f8bac152848b01a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8B4 4984 bytes
font_01_sfnt_off000209be.bin
ab983da3b8e98144a43a5d0c1a2cd25f62b1c1e13eb36a86205e172f524f07d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x209BE 11432 bytes