Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dec184b2c7b5394…

MALICIOUS

PDF

72.8 KB Created: 2021-02-22 20:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 802cdf2826aef7b35a6f3b56d8c9c1de SHA-1: 92f37994ceaa49a9639228089e38d7f6ac24373d SHA-256: 5dec184b2c7b53949c4d968440de932a150542a82f23f37a3603a47b10cf61e1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=missing+411+books+ebay In PDF document text
    • https://cdn.sqhk.co/lokiwejawe/Cjbhgie/37426753676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_6021d16b44388.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/Pcjb4TV/kixaxowovuzajoxopozilipef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5fe632dece6a1.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/ggxihlG/85546358474.pdfIn PDF document text
    • https://cdn.sqhk.co/raxipopu/bjjggFv/zusavakokegi.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/jisjdgh/asana_stock_forecast_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/LnY5gjw/52537334471.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/I0WihAL/game_of_thrones_hd_wallpapers_1080p_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/erghw9z/best_lullaby_songs_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/gemjapS/80s_pop_artists_female.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/bjdgggj/87529525700.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/lomiwexuva/formic_acid_h_nmr.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/resort_brochure_design.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/15543332329.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/health_canada_ccpsa_quick_reference_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/goose_and_gander_clothing_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/mujeminafumakelo.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_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 5176 bytes
SHA-256: e8f9b9b2aca105cde4c9ce7b58dda525f853642f9759e1c7531e4b13c66660a4
font_01_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10692 bytes
SHA-256: 9be0172cd9b89bcc81cedc26f78844499dc68d2bf1e4660a3d6ee1664f4f60f7

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