Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a12f83d151b58fe…

MALICIOUS

PDF

77.4 KB Created: 2021-03-09 12:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cf1661f3f4020ac59d59f4f48e3cd926 SHA-1: 57c46678c4210b25e3e29f873d0a3b94001fd9c5 SHA-256: 9a12f83d151b58fe22ddc8f08db0917853c950e3f8ded6dd60399aef0d51c8c1
116 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'https://golowaki.ru/award?keyword=money+banking+and+finance+b.+com+part+1+notes+pdf', which is likely part of a phishing or scam campaign. The presence of a QR code lure heuristic further supports a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://golowaki.ru/award?keyword=money+banking+and+finance+b.+com+part+1+notes+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367621/normal_5fed1e20921d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5fcf25c7b4fef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_6046f7a6882f9.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/61741258241.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5ff52aba65d63.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/gighidr/download_billion_builder_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/ShbIics/95524900236.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/ijeWxXr/joratutitovadexilikonafon.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/sketchup_pro_2016_license_key_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_6045874792c75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8da4cb-2773-4c74-b06f-efd342891369/zesekafozoradirewibosul.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/antique_john_deere_riding_toy_tractor.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/bolilaxusujed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211afabd-a00e-4d75-8136-f3f8ad00de45/86499418204.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/ted_chiang_exhalation_table_of_contents.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/arjun_reddy_movie_tamil_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd6d30c-3972-42ae-8e9d-7bece7e2c170/how_to_make_your_own_screen.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/164_nj_bus.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/bleacher_report_nfl_predictions_week_6_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b10126d-a1cf-4a45-bf0c-6117ac8eea91/how_to_use_wps_button_on_hitron_router.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/how_long_is_a_furnace_warranty.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 5840 bytes
SHA-256: 28808fdd1ae30cbba31453613ed71f568c173f5c3f3ac504c2e7c4e9f872d87e
font_01_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 11052 bytes
SHA-256: e5a527a67fd96c7806bc439c69de6bec2531dc77d8b7478c90d8201675d278c9

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