Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6672b814c83f9b…

MALICIOUS

PDF

67.6 KB Created: 2020-11-25 21:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f3866dfbdde9d84a12af3a44813a9938 SHA-1: 691c4d1f05f06b21ba56bc720ac3862aa246b5a5 SHA-256: 5b6672b814c83f9b249ed619d8bc2d92fdf3f3b16ae651803c9db84cc390f695
184 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous external links disguised as educational content. The primary URL, 'https://traffset.ru/aws?utm_term=free+holocaust+worksheets', suggests a phishing or malicious redirection attempt. The PDF's structure and the high number of external links indicate a deliberate effort to lead users to potentially harmful websites, consistent with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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://traffset.ru/aws?utm_term=free+holocaust+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413226/normal_5f944c7e29691.pdfIn PDF document text
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/weranelomaxixefozalu.pdfIn PDF document text
    • https://gunesuzupe.weebly.com/uploads/1/3/4/6/134679160/9685648.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/gejiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450628/normal_5fb990b280571.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/wizinitukenere.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/9152782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8bd8c234eeb.pdfIn PDF document text
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/nidusawivafin_zebaxu_riwiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425728/normal_5f9d157198ec9.pdfIn PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/buwotipijoteko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2783ad8f-9f94-40c3-85c0-3f098bdb6f0d/xiwanidibas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b94d17-4fbe-43c2-acda-4bd336cafb60/betatoraliwurugoxazegido.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_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 4724 bytes
SHA-256: 6fc81f9382202fb68ac92c80843cd6e21bbd663dd32efc6f4d2da953884560c7