Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d27bf6df64bd693…

MALICIOUS

PDF

126.3 KB Created: 2020-12-18 11:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4e3f4946cac4d11033ddd147f6efe114 SHA-1: ef627b22feea45909077e370cd79a4b09232fb09 SHA-256: 1d27bf6df64bd6936b777a9b790df1920d4c03d161d823dd99cf0bde6df7840a
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 suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains strings that appear to be related to the embedded URL, suggesting a phishing or credential harvesting attempt.

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://trafffi.ru/aws?utm_term=asc+842+guide+pwc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424364/normal_5fc0756dcffb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f9bba12cf2dc.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/forupokisip/reberewisagobelonegivum.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/xikujomanadumomupozumerar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a983c7b4-92f6-48df-afb9-560416a57ac3/7358467585.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/eft_emotional_freedom_technique.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/80634042776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2da9539-8a95-408c-aaf4-294ed069eaa4/29958190851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d22a583-2363-41d6-9302-f8ee8d9af653/wirefegoresomarok.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/watch_escape_room_2019_free_online_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/4250571564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e45c4f-8304-4321-9106-e8d8490856fd/canon_camera_parts_store.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/63875710928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10fc7562-3eaf-4dba-b749-cf9ac14eda63/pond_filter_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e00a137-5b00-4f7d-a81a-c018828cd43e/penal_populism_strengths_and_weaknesses.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_off0001b4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4DA 5396 bytes
SHA-256: ba72fa2d5b12e7bd13c99bc0e8651eace47b20193d9206a532d7b13785740aa6
font_01_sfnt_off0001c779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C779 10824 bytes
SHA-256: edee3684e99e018c814f41c68cdc12266bb398b5f2a3ae8f208e3c58ac4696b7

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