Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c58fda07b015eed…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 03:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99872e238120d02297a030cfc164331c SHA-1: b00b2fb35db8e28cbc10f9ef2b92fee5e68781ad SHA-256: 5c58fda07b015eed0dbd6119129674906768fcd4822bedc09d396f0916f42cc3
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that masquerades as a search result, aiming to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://gimoguvi.ru/wix?keyword=examples+of+words+with+the+root+word+bio
    • http://f1l3download.site/dinenuvipotiloklnyh.pdf
    • http://rostov-mobile-doctor.ru/lucky_block_mod_minecraft_pe_free_download7u330.pdf
    • https://cdn-cms.f-static.net/uploads/4380384/normal_6064dbd34d893.pdf
    • http://tiktoktop.design/2989309484409bsd.pdf
    • http://shoop-fh.ru/driving_school_2017_unlimited_money_apk_free_downloadyqwbc.pdf
    • https://cdn-cms.f-static.net/uploads/4480383/normal_601dd81786f01.pdf
    • http://italiahot.space/what_are_the_strengths_and_weaknesses_of_rational_choice_theoryqtwcy.pdf
    • http://summ-ita.space/life_fitness_elliptical_95xiqcsc4.pdf
    • https://cdn-cms.f-static.net/uploads/4368748/normal_600f02a6dceaa.pdf
    • http://sunny-web.ru/poultry_seasoning_on_baked_chicken6g3lh.pdf
    • http://copyrightsupporteds.com/mosufuminipuovzd.pdf
    • http://good-production20.site/nikon_dx_af-s_nikkor_55-200mm_pricejn8ej.pdf
    • https://cdn-cms.f-static.net/uploads/4451574/normal_6061a3921963e.pdf
    • https://cdn-cms.f-static.net/uploads/4388421/normal_60123be352de2.pdf
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5fef4d5715b8b.pdf
    • https://static.s123-cdn-static.com/uploads/4454807/normal_5fe2f435cbadc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wikurixobelu/nunetemojeneronuboduvuno.pdf
    • https://s3.amazonaws.com/zowibatev/99349969424.pdf
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_2a67ca95ddab48e290c92100d5d5a22b.pdf?index=true
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_0364ed67baf14da595449776c6bf5a75.pdf?index=true
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_523afc7ea61148e78ebfabe10f47c145.pdf?index=true
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_386ec6796a754a69948104da9a4a4e85.pdf?index=true
    • https://s3.amazonaws.com/vavapekadoliti/how_to_check_netspend_gift_card_balance.pdf
    • https://s3.amazonaws.com/kigavanus/weluranarajikakiruronak.pdf
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_f30d3d702f6445a1bc2fc839120542f0.pdf?index=true
    • https://s3.amazonaws.com/jeduzizonox/what_percentage_of_cocoa_is_in_hersheys_milk_chocolate.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d8.bin
387f8540b084ad90f0d1662068641f1a3c73da051f46834db111a9e0c809da63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 5540 bytes
font_01_sfnt_off00010990.bin
bb0215f6d8b291ec170631870e83a9df9ca7b4c2fb37019da72c629b4fe34992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 10572 bytes

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