Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b3fb07d6fc5f53…

MALICIOUS

PDF

74.5 KB Created: 2021-02-18 07:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8391815d3cd7741e566d74c3657a6c93 SHA-1: 276f97c7215f1bc74a4f82321066b77a1bb3fcac SHA-256: 93b3fb07d6fc5f53244ab28455f4102a824d7aa4895bdd6fe94fb02e86b16182
96 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'druttle.ru', which is likely a phishing or malware distribution site. The PDF structure and embedded URI heuristic confirm the presence of this external link, suggesting the document's purpose is to redirect users to this malicious resource.

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://druttle.ru/strik?utm_term=kubla+khan+analysis+stanza+by+stanza PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389095/normal_5ff89f7a45dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503692/normal_5feec539e040f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412593/normal_5ffffa1cbce94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_601aaa9c937e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5fda54f056363.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/idegXgc/chuchel_free_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/7tX7Yje/dark_legends_pack_fortnite_buy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_5fcc6126aa3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_5fdbe705669e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425491/normal_602d94da721dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5fee9ba8dd618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365662/normal_60091373cd4b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372982/normal_6002a8598448d.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/ieihhbh/mafimopipalokijukukito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_5fdc0e053a1bd.pdfIn PDF document text
    • http://kamini33.ru/sex_and_the_city_2_cast_lilyq6a5e.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/sedowedi/alexa_default_voice_assistant_android.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/wutabovo.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/funny_kid_test_answers_2019.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_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 5004 bytes
SHA-256: 1837883a31743d37c01261a014c050541931929753cb77f0289021c1dc7ed53a
font_01_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 10328 bytes
SHA-256: ad4863d2f454a2b62a91eff5a4e9fe95ad790c65e0cb16fa185c92811650253e

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