Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c3ed500428b89b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-22 03:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96aabd71b751217a6a5894b0ea956e53 SHA-1: 93c7e62581146ec263e2c14311e97ace7fbb6737 SHA-256: 40c3ed500428b89b33014c381688e1d0797688ddab303504472e22a84f41f907
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and multiple embedded URLs, one of which is `https://botokaw.ru/strik?utm_term=frankenstein+mary+shelley+summary+chapter+5`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://botokaw.ru/strik?utm_term=frankenstein+mary+shelley+summary+chapter+5
    • http://urolog.xyz/paul_krugman_economics_textbook5eqf3.pdf
    • https://cdn-cms.f-static.net/uploads/4403960/normal_5fd7e26b8437f.pdf
    • https://cdn.sqhk.co/zifeduwa/cS3yiiQ/rapiveribozis.pdf
    • https://cdn.sqhk.co/nuvexajamu/r9gdgct/mod_sans_smp.pdf
    • http://bisapusid.mypressonline.com/business_english_books_free.pdf
    • http://idealica-ufficialeitalia.website/vezufugunokukw5k6r.pdf
    • https://cdn.sqhk.co/butixasa/gfdjje9/best_ya_paranormal_romance_books_2019.pdf
    • http://vuvulusigi.scienceontheweb.net/8307669128.pdf
    • http://lumobumekola.getenjoyment.net/declaracion_de_alma_ata_1978.pdf
    • https://cdn.sqhk.co/xovinexesun/jft6y7M/zombie_age_3_premium_apk_download.pdf
    • https://cdn.sqhk.co/xanovika/bhbfshj/dr_driving_unlimited_gold_coins_hack_download.pdf
    • https://cdn.sqhk.co/mogudekusab/gPZ2u3j/5785823118.pdf
    • http://7lessons.space/forklift_instructor_course_near_melvdcu.pdf
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5fe35f334a4fa.pdf
    • http://moxipafuxoxo.mygamesonline.org/capitalism_and_freedom_milton_friedman.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wipibefab.onlinewebshop.net/58487640733.pdf
    • http://pupagerirawax.myartsonline.com/pesizeturabijem.pdf
    • http://rotufixijisadi.onlinewebshop.net/sozupinatikamojis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f410.bin
fe0a94c122e593c2dd5b77ee062d685f972a26acf81e57bf97c759eda393d838
pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 5416 bytes
font_01_sfnt_off00010661.bin
94f9db5dbb901c6197f500f6a939a29fbad695e540310ba43a4694abe55377df
pdf-font-stream PDF embedded font (sfnt) at offset 0x10661 10492 bytes