Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d346760b3038d6…

MALICIOUS

PDF

128.6 KB Created: 2021-03-10 16:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4a6c694b91e4952cb452dcbabc6d4939 SHA-1: 81a88954c2cdb8a567247be23da963f733a4be8f SHA-256: 71d346760b3038d6baf5a238a18971519241a6bc4d1a6b3255999b4846545ac7
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to the '42nd amendment act' which points to a phishing or scam attempt. The presence of an external URI pointing to 'nipisod.ru' further supports this, as it is likely a malicious landing page.

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://nipisod.ru/award?keyword=42nd+amendment+act+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fd3c9638e9bc.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/how_much_does_a_program_manager_make_at_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_600bba5cd3cab.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/47671460629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450145/normal_604683f27e9f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5fd0c243c7cf0.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/heu9JZD/33503208226.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391331/normal_6000904c0c049.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/pqtVKij/73127915348.pdfIn PDF document text
    • http://terugate.mypressonline.com/doxufitizitewulo.pdfIn PDF document text
    • https://cdn.sqhk.co/rowemarul/emjbiey/31889291389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_60085a1aa48a3.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/why_is_my_phone_saying_no_network_registered.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/mepidanazibati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5ff0095064db6.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/wenobagupexekap/brother_anil_kumar_telugu_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/86729922885.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/aida64_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/calligraphy_practice_sheet_generator.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_off0001bf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF9A 5120 bytes
SHA-256: 7ec67262cd888ddac7a1d51f9c7a094f58d00b65c0b93fa1dda78b07f21552a9
font_01_sfnt_off0001d103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D103 10440 bytes
SHA-256: 8421936149c5be8a565c0312f99e30d7c738e5066d6da5b35f296d63cd3fbea8

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