Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37f7ae61a435a16…

MALICIOUS

PDF

77.8 KB Created: 2021-04-05 03:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5062655f60f3e531782db0514a2b623c SHA-1: 1ede66b1a57b0e58329699fd76d44f502c7b94b6 SHA-256: b37f7ae61a435a16869f1c2a6d86ba298de2853e9b36bd964d85f608fcacdbeb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'botokaw.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to 'Standard treatment guidelines for diabetes mellitus', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=standard+treatment+guidelines+for+diabetes+mellitus PDF link annotation
    • http://copyright-infringement.business/563313282ip8wy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_601cb669a04a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6030087bef0ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_6005e2ec80c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5ff29b5c57027.pdfIn PDF document text
    • http://smartcoin.design/english_comprehension_worksheets_for_3rd_class2tx89.pdfIn PDF document text
    • http://successinyourlif.website/cuentos_para_pensar_jorge_bucay57kh8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_60434723d0d57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460063/normal_5fcacade8b7cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_60509a474c18c.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/08770c91-8456-4643-9d4a-5a222ad6bca1/78971870053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcba67cb-e475-4f19-8dc9-1836a2fc0ce8/what_is_the_nature_and_scope_of_social_and_political_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b63e5e5-7929-4587-8c43-d864b24ce6d6/96998719264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f0c046-3db5-478a-8f4b-952f7fb40050/keystone_xl_pipeline_map_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/vupezamemipotobol.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/canonical_form_example_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9bd50d-bd7b-49d3-8e1f-e0769f6b808e/fugufuxotit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa26a295-1057-46f3-b702-ce483212680f/pigenagezevovajanozafew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65fb7cc-d1f9-4313-918c-d52aa1e8d171/motorola_surfboard_sb6141_compatible_with_xfinity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6032dab4-f5de-4a9a-bc13-76afe5c07eb6/no_fear_shakespeare_midsummer_nights_dream_act_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9200dd3-16dd-477f-8eea-d13b35d6cb38/tibezixuz.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_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 5468 bytes
SHA-256: 3a882de30512e65a88c5646c97ad49e0a4edb8496c6324b37d1eb2da36c14ec1
font_01_sfnt_off000102e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 11516 bytes
SHA-256: f25cc0eb8c16abf47f7cbf6f474451d7c8791398fc2644a933b5aa4d3216a298

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