Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3a81f313434161…

MALICIOUS

PDF

63.6 KB Created: 2021-02-27 20:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8da64e41f6515500ab55062941c46048 SHA-1: c5a2122c703cd354d677ab15d5faa68264e9ed28 SHA-256: 9e3a81f313434161062f882830a0825e7a91e2fddcd3ea6871325c5fc90d43b3
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to 'free English courses' and 'Duolingo', suggesting a phishing or social engineering lure. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 4

  • 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 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://xezojetit.ru/strik?utm_term=cursos+de+ingles+gratis+por+internet+para+principiantes+duolingo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fea403728da8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_6003bdc602515.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366325/normal_6004c2a2674f6.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/remulipv1igv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_601dc65e4457a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_600c6b530e23f.pdfIn PDF document text
    • http://jnatural.space/el_oscuro_juego_de_lucifer_2vqvow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_6008d01b1ff0c.pdfIn PDF document text
    • http://talakam.space/80753450064sm3dz.pdfIn PDF document text
    • http://fitdieta.com/wirekosqjer.pdfIn PDF document text
    • http://poverkavoda.website/85090704579o46oo.pdfIn PDF document text
    • http://xosudodobuj.iblogger.org/tefotozowimagas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464083/normal_601f1d28e9d6d.pdfIn PDF document text
    • http://prodive.su/poblano_pepper_nutrition_usda330bo.pdfIn PDF document text
    • http://cpskras.website/is_there_a_directv_remote_appbv6s7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidiwen.epizy.com/47770939015.pdfIn PDF document text
    • http://tatefes.rf.gd/1911789280.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/2d_design_vector_free.pdfIn PDF document text
    • http://vefuvepux.epizy.com/impact_of_globalization_in_sri_lanka.pdfIn PDF document text
    • http://bejiteviv.epizy.com/75094686923.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_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 5144 bytes
SHA-256: a3b4c31f3b407357c755bfb1d9f431be5e2ea19888ea3faedc33f42066352158