Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f6cc449a4f1493…

MALICIOUS

PDF

84.1 KB Created: 2021-03-22 02:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba85bd6f2f6f5f905911dc9aef2cd99a SHA-1: 5749eb78b9552247fb64e229e8f3c3441eebc8c4 SHA-256: 31f6cc449a4f14930cf897d59012eecb181d23a690e15ce87d5f6fbf0c5fc462
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to 'https://soxebez.ru/award?keyword=advanced+excel+test+pdf', suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains text related to 'advanced excel test pdf' and application metadata, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/award?keyword=advanced+excel+test+pdf
    • https://static.s123-cdn-static.com/uploads/4471958/normal_5fcc008f71ec0.pdf
    • http://lorakuze.sportsontheweb.net/bacterial_molecular_genetics.pdf
    • https://static.s123-cdn-static.com/uploads/4373509/normal_5fe0b5fcdc8db.pdf
    • https://cdn-cms.f-static.net/uploads/4461204/normal_603bf9f491b08.pdf
    • http://dodemul.mygamesonline.org/sbi_internet_banking_profile_password_reset_form.pdf
    • https://cdn-cms.f-static.net/uploads/4423462/normal_603fc6ea69d55.pdf
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5fe31ba89d122.pdf
    • https://cdn-cms.f-static.net/uploads/4423171/normal_603536745d675.pdf
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fffbff45fab1.pdf
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5ffd6f875c2a6.pdf
    • https://static.s123-cdn-static.com/uploads/4448727/normal_5ff78170797ba.pdf
    • https://cdn-cms.f-static.net/uploads/4470399/normal_6013067f71303.pdf
    • http://tetupamino.mywebcommunity.org/canon_canoscan_lide_210_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4384461/normal_6039a4a7dda39.pdf
    • http://watomadoxaxa.iblogger.org/graco_pack_n_play_bassinet_insert_replacement.pdf
    • https://static.s123-cdn-static.com/uploads/4491155/normal_6002df8196a4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gusozafameximi.epizy.com/trane_xr14_price_canada.pdf
    • http://bibezakomi.myartsonline.com/69644653224.pdf
    • http://dinorafox.epizy.com/78428676441.pdf
    • https://s3.amazonaws.com/xetasif/bamexerigomovugumuwadage.pdf
    • http://taruxapajosavup.epizy.com/societe_generale_marocaine_de_banques_annual_report.pdf
    • https://s3.amazonaws.com/fumiposamisur/75745572508.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_off00010a79.bin
512aec106bad18e7a74ef9c4bf1b068d114ba529d75acfe17907f0ecb01c9639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A79 5168 bytes
font_01_sfnt_off00011c35.bin
880b40b776e05f260924c94cc7a0a1572fc96a6080fb3ce3cce951a3e847ee71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 11324 bytes

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