Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee64074baaca2bd…

MALICIOUS

PDF

83.8 KB Created: 2021-02-28 06:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b6c3ec8373f93aaab7506c76c3dfe8bd SHA-1: 28134061059b8777fd9c00ece9fe97868ecd327b SHA-256: 6ee64074baaca2bd1f3e70015960f72e0059b9996a3aefb8d3501fdb0b41a114
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body and heuristics suggest a lure to install a browser extension or update, a common tactic for credential theft or malware installation. The embedded URL points to known malicious redirector infrastructure, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=pmbok%25C2%25AE+guide+%25E2%2580%2593+sixth+edition+chapter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_603336f9d1392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5ff1b1a89db85.pdfIn PDF document text
    • http://telunodet.22web.org/34281389853.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/igj3Ljh/mens_haircuts_medium_length_curly.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/heScVjg/best_free_brain_training_app_ios.pdfIn PDF document text
    • http://guzolemidova.iblogger.org/54808141399.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4458849/normal_5fdc7ae5efdbb.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/nukebomevobe/1k1ighi/deduropubag.pdfIn PDF document text
    • http://tufilevazoropiz.iblogger.org/zinigetufujowaxuvon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_603158cda62a2.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/heScVjg/best_free_braIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://goxulotevixoda.rf.gd/large_iced_coffee_dunkin_donuts_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/math_questions_and_answers_for_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/adobe_flash_player_for_android_google_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/duplicate_marksheet_of_ignou.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/defigapafamopuzanibiv.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/personification_poetry.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/29440072573.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/24974620669.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/zineb.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/you_are_bigger_by_celestine_donkor.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/95099750432.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 6004 bytes
SHA-256: 9220ae768bb8717d93203599736c8758d2f14e956d60244bc9167fce7369400f
font_01_sfnt_off00010468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10468 10888 bytes
SHA-256: b50f6acf0c3cb0a4a92bf7c004e55cfa48f1e16f8a9f85465e8855594987837e
font_02_sfnt_off000129c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C3 16216 bytes
SHA-256: 13427436f358bea1cba8b4c296a815c99a2fc787acdd134e81d75d33178e34ff