Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31a959d9daa0ed5…

MALICIOUS

PDF

78.9 KB Created: 2021-03-29 00:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8909a6eb41ceb3d02c2c9c97b731df SHA-1: 4164fe22ae29a75c0fd268543cf3fe7cfcf9f501 SHA-256: b31a959d9daa0ed5c8d639a5d31e82fb5f029e57daab8213a4620e1106775662
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of external links strongly suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://kuzutuzo.ru/strik?utm_term=best+original+d%2526d+modules
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5fcf6445522e0.pdf
    • https://cdn-cms.f-static.net/uploads/4426085/normal_604fe39f793aa.pdf
    • http://evilcheats.fun/bitdefender_android_free_license_keyabjl4.pdf
    • http://dsv-trening.ru/29453566350f91qi.pdf
    • http://ponemofetu.scienceontheweb.net/xozifopoketobojaravufije.pdf
    • http://janafan.scienceontheweb.net/7803945418.pdf
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6016c8c6bdb95.pdf
    • http://lelekelosutov.getenjoyment.net/33951396727.pdf
    • http://zaxevef.getenjoyment.net/81264952472.pdf
    • https://cdn-cms.f-static.net/uploads/4425507/normal_601d5fa3c41e2.pdf
    • http://gikafowezogupij.mywebcommunity.org/clasificacion_de_las_plantas_angiospermas_y_gimnospermas.pdf
    • http://rowaxamapitowej.getenjoyment.net/10763559856.pdf
    • http://tilosag.mypressonline.com/pilevofometuz.pdf
    • http://kfnwejfnkwheklf.space/monographie_rose_croix_amorcsuh22.pdf
    • https://static.s123-cdn-static.com/uploads/4405459/normal_6004403981ca2.pdf
    • https://cdn-cms.f-static.net/uploads/4412592/normal_605efd7c96648.pdf
    • http://jaxagogilexet.sportsontheweb.net/barapopuviteferodabajebun.pdf
    • https://cdn-cms.f-static.net/uploads/4476954/normal_601614988cb52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xawiwevivuzox.onlinewebshop.net/ibps_clerk_approximation_questions.pdf
    • http://letutemoxeluz.onlinewebshop.net/brendan_brazier_books.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_off0000f444.bin
19152a4c591d4e905592301f3e121f5f641753a449b93e914c41dd81fc74a1c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 5044 bytes
font_01_sfnt_off00010577.bin
4166fdc8f441f447f1b3296d133960f4072464d76c3923591b0b3deb6fb4f1cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 11708 bytes