Malicious PDF — malware analysis report

Static analysis result for SHA-256 227a904eaa347ac3…

MALICIOUS

PDF

59.3 KB Created: 2020-12-29 11:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14a9446ef9e20ed53ab1e2458c47511a SHA-1: 692290fc0a24ca7fd0ad721b6edaa6b3dfdc11d8 SHA-256: 227a904eaa347ac3d356ca14014f45f5f56bce14c561f6c721dfbe0de59fa841
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to potentially malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary link identified, 'https://traffine.ru/strik?utm_term=the+walking+dead+season+one+apk+data+rexdl', suggests a lure related to popular media to entice users to click. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection ('Pdf.Phishing.Trojan') strongly suggest a phishing or malware distribution attempt, likely leveraging PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7213

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://traffine.ru/strik?utm_term=the+walking+dead+season+one+apk+data+rexdl In PDF document text
    • https://cdn.sqhk.co/navififoro/hiUijha/miniclip_games_bubble_trouble.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5fab92c42d3c8.pdfIn PDF document text
    • https://cdn.sqhk.co/dijobika/OMsgiGe/kutulesubufur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f8c22f161c56.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/iiBkjjd/jirex.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_5fa30de917dd7.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/hgeckmZ/null_vector_easy_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f879a6562f59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fa0c7cbc982b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b5c698-27ab-4572-9503-8f44f934cb72/51346807146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e54a50-d556-46c7-9905-be49db81fc39/marcy_me_709_recumbent_exercise_bike_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc8cbb4-0ec6-4cae-bf1a-d3400aa9df3a/13692880165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4b6e59-5c57-4920-90d8-291650619547/difomopolibivujozoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b99089-8431-4a6b-9cda-fb2d9771ad72/dash_diet_tracker_1200_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b396ca-a9bb-4627-a6fb-f9592b1ef028/kufatitefu.pdfIn PDF document text