Malicious PDF — malware analysis report

Static analysis result for SHA-256 1362cc427a977992…

MALICIOUS

PDF

44.9 KB Created: 2021-03-19 09:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4823c999ca83c015ee5f8ac1cab18251 SHA-1: c013c1bb3ff4a08c0327d5449f1766591fc9f522 SHA-256: 1362cc427a97799284b76ba3d866401e16fa25b14f35c6a59f64265f0b39f8fa
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot used to hide clickable links. It contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/award?keyword=discrete+mathematics+for+computer+scientists+and+mathematicians+solutions+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 44 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://yafferge.ru/award?keyword=discrete+mathematics+for+computer+scientists+and+mathematicians+solutions+pdf
    • http://mawazokaf.iblogger.org/literary_criticism_uil_2019.pdf
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/dataxiw-pofitivo-sewarijul-papamolof.pdf
    • http://notalebapol.iblogger.org/hebrew_word_study_chaim_bentorah.pdf
    • http://rixuliketasaban.mywebcommunity.org/13661911215.pdf
    • http://savineme.mywebcommunity.org/70739505790.pdf
    • http://bokegaf.22web.org/como_hacer_mi_certificado_de_secundaria_en.pdf
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/8553717.pdf
    • https://milevewon.weebly.com/uploads/1/3/4/0/134041257/0f160dc24d8.pdf
    • http://tokiridevifo.medianewsonline.com/midebufinugawifef.pdf
    • http://rebibedo.mywebcommunity.org/core_java_interview_questions_for_5_years_experience.pdf
    • http://devisufuxuvit.epizy.com/35713140738.pdf
    • http://gateguka.epizy.com/ielts_general_reading_answer_sheet_british_council.pdf
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_f4fdd7e449584af3a2e709eada47747d.pdf?index=true
    • http://kofikirigor.rf.gd/australian_accent_training.pdf
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_1342d3c569594f12aed1446ad38ab47a.pdf?index=true
    • http://nafebuxu.epizy.com/gedogufedamukarera.pdf

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