Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebc2c19cefa5d4d…

MALICIOUS

PDF

75.0 KB Created: 2021-05-06 05:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee8b9ee7b1578ec0fcaea20f775e9f14 SHA-1: 9059abb77cc60e32ccbf3d3f20ac10663f54a386 SHA-256: 7ebc2c19cefa5d4de9bc18c090a92a768aa88af4de1cdf42ff2dd15c38438555
156 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 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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=what+is+another+word+for+retention PDF link annotation
    • http://bitoxifa.sportsontheweb.net/biology_csec_syllabus_2020.pdfIn PDF document text
    • http://kovativegapok.getenjoyment.net/jazujafapori.pdfIn PDF document text
    • http://perevod-card2card24.site/nosaduzu9qp2e.pdfIn PDF document text
    • http://eagleaff.com/ford_v_ferrari_logo_pngrsxnt.pdfIn PDF document text
    • http://mandarins.space/best_book_to_learn_python_3_quorax303g.pdfIn PDF document text
    • http://tamigome.scienceontheweb.net/40263922276.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/giwojigipin.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/tigewibejageju/22502038310.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/wevig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c98a216-230d-4fa2-a7a1-8f46aeb23e8e/laxikiruvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314ee6a9-a876-4f33-b04a-abe595c96ba5/30532475185.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/bayesian_reasoning_and_machine_learning_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/22826823898.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_33a1b357c5084f7caea5d06af395ada2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/epigraphs_the_secret_life_of_bees_answers.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_e6ba95a8b5ab41658258501f49b1ba0d.pdf?index=trueIn 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_off0000e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 5068 bytes
SHA-256: db1fd13fb9e7a59a9026746233ccf9c1b3627883d595e3a5248303a02580314e
font_01_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 11208 bytes
SHA-256: cc26450070b25fe3b0eec6d926c637e4c3b561882aae889940697b8ea3acc61c

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