Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b09c779cbd8fe0a…

MALICIOUS

PDF

81.7 KB Created: 2021-03-24 10:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c376dd587a36c283c9f501b0c3623163 SHA-1: 10efb3a71c4b05d0d328f355b81ea61d2e317326 SHA-256: 9b09c779cbd8fe0a2a44d1b737377f3daa2c341bfcf84ccf3b31e68c713ac46b
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://dafemum.ru/123?utm_term=technical+airworthiness+management+manual+malaysia PDF link annotation
    • http://fakexexu.sportsontheweb.net/70881959332.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/i_vi_iv_v_chord_progression_songs.pdfIn PDF document text
    • http://sellamorem.com/wayne_dalton_torquemaster_1_manualosyop.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/xalebu.pdfIn PDF document text
    • http://copytoshka.ru/78355386640sg7dh.pdfIn PDF document text
    • http://copyrightsupport-ig.com/defending_jacob_book_plottpro0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0080f408-e6e1-4bd0-b405-6459c09651c3/93365795003.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/vowuga.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/36407054692.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/fezixoju.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/xiwusuriwubuje.pdfIn PDF document text
    • http://sarutufasiko.atwebpages.com/kolilatijusava.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/the_hitchhikers_guide_to_the_galaxy_summary_chapter_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f780e442-6f42-473a-9d85-901bbdedc0a3/97655396451.pdfIn PDF document text
    • http://sotumenaxupuxa.rf.gd/93633850345.pdfIn PDF document text
    • http://leguliwopubagu.epizy.com/kugisida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9830648-f5fc-43aa-a97b-9604f721c2b6/navy_diver_salary.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/what_is_creative_development_in_film.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/13906739398.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_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 5356 bytes
SHA-256: e3aa743ef1cccb57e1a80d14bed23a07295f09bb920037d78532a673c5e12166
font_01_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 10572 bytes
SHA-256: b21f4c5d14c174ac598613cf5144babb1957265a744f17978f4204d17bc8d05e
font_02_sfnt_off00012281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12281 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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