Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33e6c492c490615…

MALICIOUS

PDF

64.6 KB Created: 2020-12-01 18:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e0c94540c2074c360d5d115571ed66de SHA-1: abbf6ed51ed05cdf1c58d94f8c79d922a6afe674 SHA-256: e33e6c492c490615021031d9d58e1c7e033152824edee1868f9cb694d78da9fd
212 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate a link farm and a malicious redirector, suggesting the document is designed to lead users to potentially harmful websites. The ML classifier also flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8278

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
  • 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.
  • 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.
  • 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://ggtraff.ru/wb?keyword=latex%20dissertation%20title%20page%20template In PDF document text
    • https://rotowuvusokij.weebly.com/uploads/1/3/4/8/134884207/1c8eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_5f91fd1213344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8f08142f5df.pdfIn PDF document text
    • https://morupataniseb.weebly.com/uploads/1/3/4/5/134502176/tupofugavalet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_5f9dc7d21a2d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fc45c746b45c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc1769d7acac6192af81f02/1606514337802/motirojukavam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf493cf3de5e49b55a4fd0/1606371645083/cardinal_choice_insurance_plan_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dda31452f90b7fe53205/t/5fc24e7c3f75b166431f6093/1606569598139/mary_poppins_libretto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86212d8-001d-4e47-bd2c-4073edb2bf67/unblocked_games_66_electric_man_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b82641c-fa00-4a5d-b8fa-b0cbda586bed/better_vampire_lord_transformation_se.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77e6c46-dadf-425f-a623-cb6dedb346ce/59127218837.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe9d5687f52b6b7c161f/t/5fc2553cbc819f1cf4247adb/1606571325236/irs_form_147c_application.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 5288 bytes
SHA-256: 4afdcd24dd85e0aeba9ecfdbf0cad052678591d58a9f9cff4ad52f248786c6fc