Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7371c2ab7cf4ade…

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 07:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 734ce052df6461244618389f009fd45e SHA-1: 858f7facabb3b5762a3d4b7e32556182abd0b277 SHA-256: c7371c2ab7cf4ade26588f61276c9ab79a6fc22311e0806a99db94ca2ad6bf2e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, appears to be a search query. This suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=how%20do%20you%20prepare%20kcl%20solution%20for%20conductivity PDF link annotation
    • http://kieverts.xyz/cutting_skills_worksheets_for_preschoolersl4q66.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/aghkjiq/stylish_font_for_mobile_legends.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/jjb0Lif/roxinozizojan.pdfIn PDF document text
    • http://islta.fun/vulofow8zfm.pdfIn PDF document text
    • http://giocodigital.website/android_graph_view_plotting_libraryt1b1o.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gd6Mgcz/piano_teacher_2020_app.pdfIn PDF document text
    • https://cdn.sqhk.co/videbamez/cM4gfhe/one_more_line_im_superhuman.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xurixado/67713238689.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/australian_coin_collection_value_guide.pdfIn PDF document text
    • http://nenezonel.rf.gd/fefakafezovup.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/zimosi.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/68299297954.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/58664022236.pdfIn PDF document text
    • http://zisoramemib.rf.gd/tubutefozakex.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/book_of_enoch_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/juxidomoziginiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/back_to_the_future_full_game.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/13691213896.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1E 5308 bytes
SHA-256: 9783d0d4fa3bc7547b09bb9191e7c7fd793632039a46f2196fc813c642e2a1bb
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 11004 bytes
SHA-256: 7a4cf4e1d9c1d17da837c092688bcfa6bbef1df5ae9fcedec32bc3f7c2f790b5
font_02_sfnt_off0001129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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