Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bbd3cae4dd9d34…

MALICIOUS

PDF

83.2 KB Created: 2020-11-30 04:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9c15b482f05a193a66c0a1ed7a31c286 SHA-1: e3fae42d8ba7c8a8e1eeb21e66608cc89b141159 SHA-256: c4bbd3cae4dd9d34dbc2ae9627e71c5048c19391571691a0870d85cc2b018c0a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting a malicious site.

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://trafffe.ru/123?utm_term=mushroom+revolution+walkthrough PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5fa5a65adb054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5fad5917700a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fb490987a9ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6580dfba-c645-4b61-a047-71803980c39e/xuxarazan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2e2a0b-2fdd-4270-b8b8-4efed4a2f9df/vadavovunokiwugipeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37772f9a-2ba4-46ed-8474-1941f4cfe833/wilikagupiroga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f16ccd7-401a-45c4-a613-2e308e001fba/selutojofamesotifazovov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935251e6-1703-4abe-93e8-55d4d88ec0bf/grass_lake_pharmacy_pic.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/apple_app_downloads.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/gta_san_andreas_mod_apk_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a1fb4c-d5ad-4430-af01-93eebf705651/edimax_n300_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53508554-d806-4789-abc4-7f617791e4cb/gta_vice_city_cheats_ps2_helicopter_cheat_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a522d7-b8e4-4e92-b371-c462ee8af2cb/47200869490.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_off00010716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10716 5320 bytes
SHA-256: 3fdf8223397f9c7589a67c357fc284ca381020b54ce497feadb04dc182bf9565
font_01_sfnt_off00011920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11920 11492 bytes
SHA-256: 9104e1e3bc0fef8006e0fa082b5b39d5ee710aee754205d67bd8fdddc6c6d35d

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