Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8a2ae93f6242b9…

MALICIOUS

PDF

67.6 KB Created: 2020-12-14 04:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 87144b35fd603a6a0d25bd35c3005ebc SHA-1: 323e124dbafe2662d2f2d55dd3ce5f6ae7f15c86 SHA-256: 3c8a2ae93f6242b97cebee43e79403162fc55a6b9f8e8920d583ea022d38357d
212 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://gettraff.ru/aws?utm_term=cqc+reports+care+homes In PDF document text
    • https://zunesevofulopu.weebly.com/uploads/1/3/4/3/134385883/4236380.pdfIn PDF document text
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/3756452.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/4733235.pdfIn PDF document text
    • https://difiraboveju.weebly.com/uploads/1/3/4/5/134508976/zasadubuzanov.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/rapaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_5fbae01524ae9.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/vifusupegiza/harry_potter_hogwarts_acceptance_letter_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc663662e537a05ef2e8a84/t/5fca17ab6a94db17e497cd2a/1607079851998/duzonadowemagonin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce32fe2cf4ad19c3ab71c5/t/5fd60afd89566e781f459c2d/1607863038354/autocad_2017_mac_os_mojave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48394eb3-1a4e-4ae0-b698-7831655da72e/13585138404.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc0f81018e72e5fdbfa083d/1606481942260/leq_ap_world_rubric.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/cours_cardiopathie_congnitale.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/93974115448.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27abd116eb00e3c55ea17/t/5fd1e62c133bcb3b88a0bb76/1607591470195/download_game_home_design_3d_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa10a39f-4b95-4cd1-ac3f-d1b1c5e9c589/renason.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_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5172 bytes
SHA-256: 24c129b104965f490114cc1eed72c743ca5bd50ab44bc32d1298312cecb79e10