Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1805d27ad3e21f…

MALICIOUS

PDF

69.0 KB Created: 2021-03-23 22:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ffe50296b19d0aff83218012b8e855 SHA-1: d2df946ff130c5228e9205f6932901b43e547cc7 SHA-256: 4f1805d27ad3e21f29fab320e9b9e18e641c578d455f3858d42fde92584b749a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL suggests the document is designed to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=admiralty+chart+symbols+and+abbreviations+pdf
    • http://lukiduxipapep.mywebcommunity.org/majofumapugowunoxavos.pdf
    • http://xuxikurov.mygamesonline.org/capitulaciones_matrimoniales_ejemplos.pdf
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5fdfc4b491e4f.pdf
    • https://cdn.sqhk.co/nuzinirumawe/gfOhe1E/wovepekidinaworanifud.pdf
    • http://vabaxowerad.iblogger.org/bageliseluso.pdf
    • http://kitafoged.medianewsonline.com/puzidun.pdf
    • http://gizovivomiz.getenjoyment.net/dream_a_little_dream_of_me_piano_accompaniment.pdf
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6017b927a9b2c.pdf
    • https://cdn-cms.f-static.net/uploads/4379487/normal_6057fc379a0b0.pdf
    • https://cdn.sqhk.co/kitijorawul/heBoiE6/87778914323.pdf
    • http://fudoviwil.mywebcommunity.org/history_of_3d_animation_timeline.pdf
    • https://cdn.sqhk.co/gamakokub/iKCjgh2/tonotuwifefug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jatugeset.atwebpages.com/wuzames.pdf
    • http://didajuna.rf.gd/xokozovovadilumebewo.pdf
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_cfb342ef421e4125b7354005549c1148.pdf?index=true
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_15e71b5f7e284ed1a674e28e337e90bc.pdf?index=true
    • http://wupubew.epizy.com/exercices_de_grammaire_francaise_pour_debutants.pdf
    • http://wobosososozase.epizy.com/inside_the_artificial_kidney_machine_worksheet_answers.pdf
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_f8a4265fc1fd4c9a9e9c837729e56d40.pdf?index=true
    • http://vatilibudavelit.rf.gd/abbreviations_used_in_medical_reports.pdf
    • http://kibagog.onlinewebshop.net/makepolitulofatesulotujug.pdf
    • http://pizitibasowu.atwebpages.com/ribikarefumowakikijipe.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_off0000cebe.bin
d34636f93a1bcf30e57d0a32df997bb0952b2168a916cf4140898c4aa4c5d18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBE 5684 bytes
font_01_sfnt_off0000e1ef.bin
b5bdd14d886f8147bb0f80b8f9bad92d1e22c7709a9df334ac6605f2864b9797		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 10700 bytes

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