Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec372e5628d97f4…

MALICIOUS

PDF

68.9 KB Created: 2021-02-18 01:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9117c5f4518f1b3a35990fd79de7831f SHA-1: 76faa7f5c3c08463e4e953b60df92f31297515bf SHA-256: 8ec372e5628d97f411ed5f36faf0db7f6d87f9476b5539f00687a6fd1571b4ba
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'leonvi.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially for phishing or to download further payloads.

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://leonvi.ru/wix?keyword=ct+scan+cpt+code+guide
    • https://cdn.sqhk.co/kimejijomaki/thafdgg/kitten_match_mod_apk_0._12._2.pdf
    • http://shothard.site/43448668054uthzo.pdf
    • https://cdn.sqhk.co/kegufamop/yJhfhjH/83372344566.pdf
    • https://cdn-cms.f-static.net/uploads/4403680/normal_602c29da341f4.pdf
    • https://cdn-cms.f-static.net/uploads/4453134/normal_6024133756e51.pdf
    • https://cdn-cms.f-static.net/uploads/4485440/normal_600dfcc7bff37.pdf
    • https://static.s123-cdn-static.com/uploads/4475728/normal_5ff31bfea3b2e.pdf
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5fde4c3137ce7.pdf
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5ff70bb0e3fa6.pdf
    • https://cdn-cms.f-static.net/uploads/4422136/normal_6020965ee9d91.pdf
    • http://hrushch.space/77249071494u2k8p.pdf
    • http://shortsomfj.space/dabudo7wovp.pdf
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5fe26442e4b19.pdf
    • https://cdn.sqhk.co/wadusazilox/opha7if/five_nights_at_freddy_s_game_unblocked_6969.pdf
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5ffa4d9e6ccfc.pdf
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fe3ad91f0e44.pdf
    • http://giocodigital.fun/cronica_de_una_muerte_anunciada_resumen_corto_wikipedia4gwg6.pdf
    • https://cdn.sqhk.co/sebidurubuze/jdhejgS/82269063295.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d125.bin
bf20844b159c3db52f70dac65a5754ade861f6078634b3741cb80ace7b728e5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 5016 bytes
font_01_sfnt_off0000e24b.bin
6664ee7011561709c5af3140c6e13aa2509512d55dad2a1446a3d4de2e1c7056
pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 10744 bytes