Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3dd57be0ae46be…

MALICIOUS

PDF

73.7 KB Created: 2021-03-20 17:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7e1fd9c1816b204d30ed5ca33bb663ad SHA-1: 5c19352c50a69210e2c245be4be088a5e4ec6865 SHA-256: bf3dd57be0ae46beeb99ce1a900e84d2e5d717b123d82edd2a7b3054e0325449
162 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=energy+note+taking+worksheet+answers In PDF document text
    • https://cdn.sqhk.co/madozozafi/dijgiaJ/cartoon_avatar_the_last_airbender.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/iajd9jb/wavosos.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/eXXAgdW/17740197670.pdfIn PDF document text
    • http://remont-pc.website/418622643748iui4.pdfIn PDF document text
    • http://opsnatur.fun/jikozelupek0vb2c.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/11059076171.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/sl0Jeha/dog_run_ideas_for_small_dogs.pdfIn PDF document text
    • http://wacc-cat.org/73028023393h1mjs.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/gobojetoxabefosop.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/bichgfd/monster_vs_zombie.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/kibupotusigida.pdfIn PDF document text
    • http://zarabatyivat.ru/allen_bradley_1734-ib8_user_manualaa3pc.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/tibanepoxilibud/asra_guidelines_neuraxial_anticoagulation.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/canon_rebel_t6_manual_shooting.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/10230026092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c736e16-a11c-47a1-955c-0484212f7e30/24803794253.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/graphing_quadratic_equations_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40734c75-834e-477b-a9a2-11378b461298/zigif.pdfIn PDF document text
    • http://bugenuvumap.atwebpages.com/jenip.pdfIn PDF document text
    • http://bojepudadadax.atwebpages.com/98488576336.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/gapuliligezix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68a097c-454b-4fb4-9e01-fda845d26af1/84147495804.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/emulator_error_android_sdk_root_is_undefined_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/little_foxes_wigan_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/labaparimuzijikujagakaber.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_off0000e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 5132 bytes
SHA-256: c9d4b319a4682a3a728db6e27c74d4a3a6b3520bb528a71f90cb10dd3b692ff1
font_01_sfnt_off0000f661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF661 10164 bytes
SHA-256: be3468c56bc7850c9ccabbd01174f56dad6f714c52bfb29aa5575b13e55abbf6

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