Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2eaf95ad3fb8e1…

MALICIOUS

PDF

65.9 KB Created: 2021-03-04 17:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f1596973881588ad2df484b363c3e145 SHA-1: 40c7b97b4535dd6fc50e5dc21d5c37d7653fad10 SHA-256: 2d2eaf95ad3fb8e1e89b0aa6020b1d2c028c032791613780d4a42327def5bf71
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 URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure related to educational material, likely intended to trick users into visiting the linked URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=chapter+5+deportes+vocabulario+1+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5fc84468c86a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_602783e05291b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411686/normal_603e29c7c3d51.pdfIn PDF document text
    • https://cdn.sqhk.co/guzamuvi/iaDmBhj/china_zone_tattoo.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/jiijMv1/lafagajodukola.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/fgdFqjg/slifer_the_sky_dragon_gbi-_001_fake.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/napoleon_hill_think_and_grow_rich_book.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/nicholas_sparks_two_by_two_book_review.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/jgEVigj/kizakidurajutifamitejaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5fe47642c006f.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/ifjaehe/xipunezuxatuwinuralejivil.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/bigc0ie/tech_go_launcher_ex_theme_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_601be30da3442.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/sejhBoe/besuboxubarukefon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fe025e96b2b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422134/normal_5fe342960003e.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/kerasexarinikowarav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zijivevip/maxovilesabiju.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/how_much_does_adrenaline_trampoline_park_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/44529135816.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_off0000c5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 5536 bytes
SHA-256: 9fb46dd8082a7d496f74e788e0562086c0e27d04864c72ea6ca1220761999959
font_01_sfnt_off0000d89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89E 9880 bytes
SHA-256: ec75e22ee10d3281960ef6c7d50c3e7f8cae8800d3054f691ccebf54dc76607d

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