Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e46f7c5950ac240…

MALICIOUS

PDF

73.7 KB Created: 2021-06-02 20:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1cad8adb10742ec6947781478861ecbf SHA-1: 736197036d8f9f7b587cad7bd9bb93f299177619 SHA-256: 9e46f7c5950ac2402068be6dd962c45fa25f5a9337a96cc54ffab60b9e5fe2c3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as instructions for a Microsoft wireless keyboard. This is a common social engineering tactic to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://crewmak.ru/pbw?utm_term=how+to+turn+on+microsoft+wireless+keyboard+1000 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4485172/normal_60b6ba8b768d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5fec1ea5cd676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_606085ad550c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_600739b4f3010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5ff26105d9f5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_604de30498f2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5ff88954ce489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_60697fabdd251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455377/normal_6011d300008a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_6037129241846.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/036fbedf-e4c9-420f-8b97-8af849794449/84974491047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ed70ef-1ed0-4938-bcb2-bc3cb1eaab07/xazaxonimubixozowamisib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bf4256-e89e-4a1a-97ec-de581303b28b/winchester_gun_safe_lock_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5996ddd-11ea-48a7-bb64-d2e5382fb166/banis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc05ccee-efe5-49d1-87c1-453a18057e5c/what_equals_1113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040f2e12-c7d7-4cb2-8ef1-1f089e582eab/60060198586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346128f0-915f-440b-9104-58927d755d59/c_programming_language_book_by_balaguruswamy_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dcb92a-1485-442f-a694-4c9318286503/marantec_garage_door_opener_program_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ee8372-803b-420b-854d-10c449ec3339/27240085329.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_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 5720 bytes
SHA-256: 8e097b3e77a409b28c8b2fbba539ee27391678ec10c6df892e528f62277e1f09
font_01_sfnt_off0000f49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49A 10756 bytes
SHA-256: 01d806819fa2f11494622cac8af723ad43c846c7ba1722ea55268886b2ec82f3

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