Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e82154c866fe31e…

MALICIOUS

PDF

67.7 KB Created: 2021-02-04 01:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6aa755a65196557042e0d9d3ec7da36e SHA-1: 9f36fed96a4d4030781c9eeb83398fc279a8f779 SHA-256: 5e82154c866fe31e9e615424bfc0e601f2e810e2d024159fb5fa5fb4e5f3d22e
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 URL pointing to a malicious domain, identified by both heuristics and a machine learning classifier. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, appears to contain product-related keywords, suggesting a lure to disguise the malicious intent of directing users to external, potentially harmful, content.

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://leonvi.ru/123?utm_term=char+broil+performance+4+burner+dimensions PDF link annotation
    • https://cdn.sqhk.co/ratevusur/atVhezp/galaxy_stars_projector.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/heUiagf/37466404557.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/ghjckid/boromusasaginoz.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezima/hdVPnhe/xuwebixusotaxawi.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/gfjgAhd/tripp_trapp_baby_set_assembly_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/awhg9ij/la_novella_degli_scacchi_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/f4hggim/godzilla_defense_force_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/XjeAid5/breadwinner_meaning_urban_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/bg5Vgjt/xugugazukuxumavi.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/gLieYur/auto_parts_store_japan.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/L2OHgcG/extreme_drag_racing_mod_apk_revdl.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/lodazojamuva/joseweju.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/bluetooth_for_windows_10_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/python_flask_template_inheritance.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/dusedex.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/51233608025.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/13072603253.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/computational_aeroacoustics_a_wave_number_approach.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_off0000ca49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA49 5528 bytes
SHA-256: b7c9ca8cbc0f0363584865945b82f744a0185864a44828dd95cebc8d75b31550
font_01_sfnt_off0000dce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 10772 bytes
SHA-256: 19d591e7bf7563c341570312fba8f02400c5335e7ec089e45b4e2b4e6e98798d

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