Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d53da7d9119a8d2…

MALICIOUS

PDF

72.1 KB Created: 2021-03-30 14:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 97311ccfad9fce233166b37f93811f2b SHA-1: 52777aab1ef98c5612c98d824b8f4f174fffb5b8 SHA-256: 9d53da7d9119a8d2fdfb76e52c49dca43ae23fd99fc3f1a31954ea8d54c71852
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/wix?keyword=transformations+test+answer+key PDF link annotation
    • http://xegazinijitup.mywebcommunity.org/candle_in_the_wind_1997_sheet_music.pdfIn PDF document text
    • http://dazesejep.iblogger.org/how_to_communicate_effectively_in_the_workplace_ppt.pdfIn PDF document text
    • http://maripifedama.22web.org/91071880147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480393/normal_601c70623737b.pdfIn PDF document text
    • http://nokuxitajorox.22web.org/sagororeserekobe.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/tanurigaweli.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/mercruiser_4.3_oil_filter_location.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_60175e442c1eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493201/normal_5fca13744e236.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/gh9Igjf/borakeseratosowodi.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/pamogigadifuzab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_601b8ea77e54c.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/hcVi7gc/nutupe.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/46052514546.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/FysgiRH/average_height_for_women_california.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_60047524b4b85.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/15359824136.pdfIn PDF document text
    • http://jijukilodo.iblogger.org/69392205422.pdfIn PDF document text
    • https://cdn.sqhk.co/juzogimuju/haBzngj/replika_pro_free.pdfIn PDF document text
    • http://varuzajuv.22web.org/asphalt_8_android_file_size.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://wetusadesaxoni.rf.gd/aceite_esencial_de_mua.pdfIn PDF document text
    • http://todiwefexoneb.atwebpages.com/marriage_certificate_form_pune.pdfIn PDF document text
    • http://zevebetuj.epizy.com/social_media_addiction_research_paper.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_off0000d021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD021 4876 bytes
SHA-256: 621a211283b6f61835341d86c9d0ed02dbb6b61cd6c8bc179dae281cf26b854d
font_01_sfnt_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 10888 bytes
SHA-256: 863ec8cae643efed91a3db5c52ed1fc233c361eb47e298d0e68b6d3dd6defb76
font_02_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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