Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5a1369d4f25d43…

MALICIOUS

PDF

80.5 KB Created: 2021-02-19 06:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ffacd6e8250681c1ec79d349d3aba46 SHA-1: 2498d97fd1313c03c6dc29dbef1da1d60891b02f SHA-256: 8d5a1369d4f25d4358d9c0a4d7a8a83c0bbe0aa971d443e6a7c0b6722151340e
96 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 external URLs that direct users to attacker-controlled resources. 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
  • 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://druttle.ru/wix?keyword=drawing+angles+in+standard+position+worksheet PDF link annotation
    • https://cdn.sqhk.co/buzomesil/ggicRIh/volenezedatazas.pdfIn PDF document text
    • https://cdn.sqhk.co/molofagaji/ijbTgcx/kobe_wallpaper_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/Bjcejda/gun_simulator_codes_wiki_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478146/normal_5fc7ea5e0bc88.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/iaaf0je/41917503031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fe74d7cbe4d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369630/normal_5ff3478873274.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/HwgeUhg/31421674096.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/99934539925.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/seriposuj/cisco_unified_attendant_console_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/birthday_greeting_card_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/android_color_attribute_should_be_defined.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/catholic_answers_telephone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/vuxupa.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/powerpoint_templates_microsoft_office_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/user_story_and_acceptance_criteria_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/97640839581.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_off0000e880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 5376 bytes
SHA-256: e0a79fc2bb27f9646abb1fd43facf021ef1fc78b00410dcd031056efa42416bc
font_01_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 10672 bytes
SHA-256: 37eafa121178c2250332b3a1696a1075cac7e7f800f7d21e7998f1e19d48ee58
font_02_sfnt_off00011f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6F 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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