Malicious PDF — malware analysis report

Static analysis result for SHA-256 b421c7bddb9155be…

MALICIOUS

PDF

66.6 KB Created: 2021-01-11 17:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7f568d9f60d253ab951bea77d7f54702 SHA-1: a5be914dac61a88c6c1dcfd6463365551f911ef1 SHA-256: b421c7bddb9155be1f2859c9736a0501ee107123cff9485afa8174232cebaba2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure related to Google Docs table of contents issues, directing the user to a suspicious URL. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. The embedded URL is the primary indicator of a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=table+of+contents+in+google+docs+not+working PDF link annotation
    • https://site-1196452.mozfiles.com/files/1196452/94731568482.pdfIn PDF document text
    • https://site-1176438.mozfiles.com/files/1176438/background_photos_for_picsart_editing.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/jasvSjj/borimijiwaduwakufazuzud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fb2907adb235.pdfIn PDF document text
    • https://site-1177831.mozfiles.com/files/1177831/75061268161.pdfIn PDF document text
    • https://site-1176532.mozfiles.com/files/1176532/50361282032.pdfIn PDF document text
    • https://site-1171584.mozfiles.com/files/1171584/34847696166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcebb1ab8ee1.pdfIn PDF document text
    • https://site-1178549.mozfiles.com/files/1178549/setowufusugaw.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/vajefam/hanuman_chalisa_lyrics_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/chromeleon_6._80_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/apache_tomcat_8._5._41.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/cctv_video_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/67395107715.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/juxukupebonisumadagodi.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_off0000c7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E2 5432 bytes
SHA-256: 7d38ddc0604640b8581d12ae406673dd06b8a338ba486861c8c8357ec9dadc18
font_01_sfnt_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 10268 bytes
SHA-256: eeb5efe2f176ff4b7c3c8772d1149c560994fa8010179b5d97da29f5fa319b40