Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7ab64404adf8de…

MALICIOUS

PDF

72.7 KB Created: 2021-02-11 02:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9003e1f02e64d49f44b4158836ec8435 SHA-1: aad1f1be584996c7a62170b227310bc59163552a SHA-256: 1d7ab64404adf8de013137f20a2d7c4521559e75adf4e977b19ddba00e8a2af3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that masquerades as a legitimate search result for a medical guide, likely to trick users into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or redirection attack.

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://leonvi.ru/wb?keyword=sanford%20guide%20to%20antimicrobial%20therapy%202018%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370089/normal_60098457cffd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483362/normal_600d8da0c0740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426974/normal_600809ee32ec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_60239df6c992f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382613/normal_60008b950fc2d.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/mYmjdii/small_bright_dog_collars.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370547/normal_5feea681be118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fcc367a80187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488330/normal_600714cf32e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_6022e9ebd42cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5fdebbd6215c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_60158743a1202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_5fd3bea7966da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_6011854c29310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tugepujato.rf.gd/avira_antivirus_pro_business_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE37 6136 bytes
SHA-256: ca6478e3b2bcb620651d7924be34f7ca077b3f501ee779c1a1d1bef1884f2efd
font_01_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 10988 bytes
SHA-256: 8903b2366e810312967d6c6702c2aa82fc2ba9081bf81011468f34179ef3c047
font_02_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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