Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e114172dd84c596…

MALICIOUS

PDF

70.1 KB Created: 2021-02-24 06:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 24896b58ef0377504e886f651f12dcde SHA-1: 1726f2bfaab9d149edf5ef100a2f8d0bf2bb73dd SHA-256: 3e114172dd84c5966f7f583c3289e363861b37f1366d55476b50608e0dd6ec78
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirectors, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious URLs suggests the document is designed to redirect the user to a site that likely hosts a phishing page or downloads a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://crophysi.ru/123?utm_term=dance+music+playlist+2020 In PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hca80u5/pedusudeje.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/e0daujb/best_likes_for_instagram_app.pdfIn PDF document text
    • http://souve.me/96511762191vn32s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_600f04b475703.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/TheaIQw/23996179546.pdfIn PDF document text
    • http://unonatur.space/3648860674552rvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_600c9e51acb3a.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/dXXJhif/plinko_master_app_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/SRhggGR/president_simulator_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fd61aec32a8a.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/iiPidhb/zombie_movie_cast_disney.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_601de199dd854.pdfIn PDF document text
    • http://robinmani.site/sofozigojojixb4zc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373304/normal_5ffaf1df2332f.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/dWgiajg/35789083341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_60339c2212a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_60252dca48635.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/3xnVuhf/buffer_company_wikipedia.pdfIn PDF document text
    • http://dfds.in/vufonulubafogiit80x.pdfIn PDF document text
    • https://cdn.sqhk.co/kapudome/hiEiggi/70181053167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369524/normal_6002e01e6afa6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58E 5356 bytes
SHA-256: dc26417a8fdfab783ac12f9ba7628ee6360e41a921c5fb8beffc12f7ff53bb13
font_01_sfnt_off0000e7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 10424 bytes
SHA-256: 6ea0b11975754a2f4bbcee31070f90b2439fd55aabe37b6c3be34ff02947c84e

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