Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb41305c0e7bdad…

MALICIOUS

PDF

50.6 KB Created: 2021-01-03 12:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f250b280947c305dbcc842971de30745 SHA-1: 568e35789e9172b54932af968545800e01a65c70 SHA-256: edb41305c0e7bdadcd5dbad3abf5726f5f8f70fecb62ca481789103ed0bb8208
242 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links pointing to external PDF documents hosted on various disposable domains. The heuristic firings indicate this is a malicious redirector and a link farm designed to manipulate search engine results or distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5258

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
  • 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.
  • 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.
  • 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://traffmen.ru/aws?utm_term=funny+trick+questions+answers+tagalog In PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/960b96b0e.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/KehiHbR/coloring_football_player_pixel_art_by_numbers_band.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/7eb6f025.pdfIn PDF document text
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/c5414e2270.pdfIn PDF document text
    • https://roruzutal.weebly.com/uploads/1/3/4/5/134592711/desusukizupuli.pdfIn PDF document text
    • https://cdn.sqhk.co/topedimerab/jhXgh6m/25496945066.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/wutetarejusosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5fd790653a072.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/jdgh2gg/pinout_rj45_poe.pdfIn PDF document text
    • https://nazasakodaz.weebly.com/uploads/1/3/4/6/134667833/kakus.pdfIn PDF document text
    • https://kaseledewa.weebly.com/uploads/1/3/2/6/132682802/762130.pdfIn PDF document text

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