Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5092c1683a984c…

MALICIOUS

PDF

66.6 KB Created: 2020-12-16 04:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 47e112f183d1d8ced5bec52db0e54d6d SHA-1: 3bfd9851ec42d6968150f7eddd06a32465f89370 SHA-256: 6e5092c1683a984c98feb95cda21248a723a2aa24fae57ab0a981ba1ff0aa8d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a reference to '40th wedding anniversary symbol', indicating a lure.

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://traffnew.ru/123?utm_term=40th+wedding+anniversary+symbol PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fc740bbaef23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_5faf3ca085606.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/b5c7ceae-c1d2-4a1c-b8dc-1e55adb159cc/80576322653.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/a_room_of_one_s_own_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/gradual_release_lesson_plan_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06b464a3cc4058a5d7ee/1606223551475/que_es_un_protocolo_de_investigacion_ejemplo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc07d87a-00ab-4bae-a7c0-a0a83e2eedec/dyadic_green_functions_in_electromag.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/33122251385.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2afeac6d96458362da14e/t/5fd1fc42ce71ee580faf8902/1607597123538/ritozewodoxojesivivet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5e6c7acac6192ab86dc9/1606377071126/please_look_after_mom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c488d4-b2e6-4dc8-9e7c-2af24128070c/vezamaxozodojarizi.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_off0000c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC728 5768 bytes
SHA-256: 5f9e069b7152991806868a263b08c3cb55656fd5dd0034a32491440218aef86a
font_01_sfnt_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 10428 bytes
SHA-256: b4339042b20c87ac9a2b35843e64dd23a63c1603f75db0a4d0f64f52f375ed68