Malicious PDF — malware analysis report

Static analysis result for SHA-256 d639fd1d5599c08d…

MALICIOUS

PDF

72.0 KB Created: 2020-12-21 11:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 53cb89b7b891d567a0cd49a5ddc2665b SHA-1: eb2567d890f15ec575653bd4f24655bbcbd35ad0 SHA-256: d639fd1d5599c08d5a3b39f77aef800a3562a6d0410dc63b13a89c4a20e338a7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to deliver a payload related to a game hack. The document body, though heavily obfuscated, suggests a lure related to 'Crazy racing 3d hack apk'. The presence of multiple disposable hosting links further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?utm_term=crazy+racing+3d+hack+apk In PDF document text
    • https://kogatakuzomaw.weebly.com/uploads/1/3/4/4/134444425/digulujabuf.pdfIn PDF document text
    • https://galevegu.weebly.com/uploads/1/3/4/5/134507196/303bc1f00f.pdfIn PDF document text
    • https://nevitasez.weebly.com/uploads/1/3/4/3/134305442/248415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_5fac4cd4cca08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464319/normal_5fded71e6092f.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/5354643.pdfIn PDF document text
    • https://zazejisodixad.weebly.com/uploads/1/3/4/3/134359446/sitoge.pdfIn PDF document text
    • https://bosebekepomij.weebly.com/uploads/1/3/4/8/134870535/malomu-rosuxadofome-fonerir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b5e910-c48b-46d2-80bd-ffda04d318ed/11743133113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa27fe03-8ec8-42b2-a95d-00642686d12d/ninopusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4747a40d-9f91-46db-ae3f-3277d7f10c2f/valuvumemujamujakarude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ac789e-0465-449d-a99d-854e0cccd24d/kangertech_subox_mini_c_manual_espaol.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A8 2880 bytes
SHA-256: ac64b8af80fcca1e0e594fba8a0f1e66fdecb42d42f059741c9e9f76428d751e
font_01_sfnt_off0000cfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE7 5412 bytes
SHA-256: 68659f3fcc6bd346a7e7cfb8b73fbe5c71e114ac246a4540784f003281d31fd7
font_02_sfnt_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 15376 bytes
SHA-256: f12344036f58e3617893ee2177fedd1ea260225be12d10c37de3a59709a9c6bc

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