Malicious PDF — malware analysis report

Static analysis result for SHA-256 09338891e88083e7…

MALICIOUS

PDF

55.7 KB Created: 2021-03-18 11:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f1ee2f025ff902a7026a374575fec2b SHA-1: 9e510e54aa35c8d1a2f9e8e56f5464cbd2e79915 SHA-256: 09338891e88083e752ceeb26706080be2ae16d4c13d4b162f90fe949901fdbc0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The document body is heavily obfuscated, but the presence of external links suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6222

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://golowaki.ru/award?keyword=saree+blouse+cutting+pattern+pdf PDF link annotation
    • https://cdn.sqhk.co/menekilebuz/KZjcA7W/chat_application_using_firebase_android_github.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_5fefc34cef568.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/7Dthjpr/police_siren_trap_remix_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/hcghbeR/best_sculptures_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_6010903f3aba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_60170ebd744c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496571/normal_5fe917b090542.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/diijeja/69486604248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fe9f1afcd1ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_6017649048da4.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/jgchjjg/19838770217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393637/normal_5ffd5a9ad9e9a.pdfIn PDF document text
    • http://gofekujapi.rf.gd/1385645156.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_38bfebab305d443ab0f6a5181fd36257.pdf?index=trueIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_b1314f9a869b4d44b06daf84a4aba430.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_b5644493ee714380ac75097e798808fe.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_b3de8760b3644b4fa2af83891f608d48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/acute_angle_closure_glaucoma_treatment_guidelines_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/hardboard_sheets_lowes.pdfIn PDF document text
    • http://rexamif.epizy.com/julian_date_calendar_2020_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/16998010546.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_bd753d8ee8394a9b9a832c5637dd9001.pdf?index=trueIn PDF document text

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