Malicious PDF — malware analysis report

Static analysis result for SHA-256 345db4041a91c824…

MALICIOUS

PDF

77.9 KB Created: 2021-03-15 22:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5ea85e23a92d47ab251949e77c5b62e SHA-1: cf892bb82771e82f544446fb50e2603200b2ce0b SHA-256: 345db4041a91c8242defd10afee606096d60dbe19dfc6842680b883f396a3f08
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as vacuum cleaner instructions, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of embedded URLs and the overall structure suggest a phishing attack aimed at redirecting users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=dirt+devil+power+max+vacuum+instructions
    • https://cdn-cms.f-static.net/uploads/4476420/normal_604de94e47d5f.pdf
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fcf2eafd64a8.pdf
    • https://cdn-cms.f-static.net/uploads/4490129/normal_5fdad45dc191d.pdf
    • https://cdn-cms.f-static.net/uploads/4471688/normal_5fe9c81e2fd6c.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5fe6bbc099eb2.pdf
    • https://cdn.sqhk.co/nadetajagupe/fRshLia/igbo_kwenu_t_shirt.pdf
    • https://cdn-cms.f-static.net/uploads/4470029/normal_6026ed7491f58.pdf
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5fc8e89b59d7a.pdf
    • https://cdn-cms.f-static.net/uploads/4385869/normal_601576606141e.pdf
    • https://cdn.sqhk.co/dewufidabo/xibidRq/guzomirokekipijomi.pdf
    • https://cdn-cms.f-static.net/uploads/4381737/normal_602ffeeab6379.pdf
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5fc6ac688c1b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2339bf18-8213-4e08-8652-c6332cad24df/39569624087.pdf
    • http://dabemekos.epizy.com/74985113765.pdf
    • http://bedegexemizi.epizy.com/how_to_reset_bose_lifestyle_600_remote.pdf
    • https://s3.amazonaws.com/bisazabe/61300925400.pdf
    • https://uploads.strikinglycdn.com/files/eda8cdfd-e3d3-478a-bbe3-812f27cce3e8/nudamozazipefafejebemisif.pdf
    • http://liwumulexajuvi.epizy.com/angina_estvel.pdf
    • http://jabaxuzadowepep.rf.gd/atul_bioscience_limited_annual_report.pdf
    • https://s3.amazonaws.com/wiwuxot/gugijupitogoxemuj.pdf
    • https://uploads.strikinglycdn.com/files/87cc93db-ddcd-4a85-8dc6-f163afa0bca3/is_samsung_5_series_n5300_a_smart_tv.pdf
    • https://s3.amazonaws.com/fajetufekejo/apc_back_ups_1500_pro_manual.pdf
    • https://uploads.strikinglycdn.com/files/fde71f90-b38e-4341-bec9-6c4f234cb304/xudobinimobabifasawuf.pdf
    • http://darusifutedu.epizy.com/ayushman_bharat_yojana_card_list_2020.pdf
    • https://uploads.strikinglycdn.com/files/e60315d4-6c0c-46ad-b41c-9e44376765c7/segavetawetutegufifizop.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_off0000ef51.bin
74053e8c8855d41011c6e94f5f28ece54dafa82a087763f8a42692eb73000e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 5436 bytes
font_01_sfnt_off000101ce.bin
aec964830d33b51f6fc210934ef4ab8e674e99688cae8d95e1830bc467bf83e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 11776 bytes

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