Malicious PDF — malware analysis report

Static analysis result for SHA-256 15af9c0290ce912e…

MALICIOUS

PDF

68.1 KB Created: 2020-11-23 14:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 917577e44045014c7937333dc329277b SHA-1: 81d50c9d543869b7db1dbdbf269263df8644c445 SHA-256: 15af9c0290ce912e73d6f3570870b8726b14f517a0e26abd53bb27a92cc00423
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/strik?utm_term=gestion+escolar+esca+santo+tomas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f93f3d0d5c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fa6b6e221ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87178f10535.pdfIn PDF document text
    • https://xojuliwujugiseb.weebly.com/uploads/1/3/4/3/134388488/8176865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f8ede3bbc037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8701698ab5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geraromu/87054803684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cd1a70-83da-4143-8af5-6d4dc672dc19/magnum_lifts_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58b059f-2216-46c8-aa11-b01be1ab32d0/kanezofawotarogopejawebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453bde79-4911-40a3-bade-b101ae57f5e2/babupuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a07d14-639e-40cf-b8a1-8353ecf5f711/jabujedadiwatil.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/spider_man_2002_game_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381af36a-deb4-404b-9454-9a266bd2876c/beauty_queens_libba_bray_sparknotes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 4976 bytes
SHA-256: 914fd368398162619c6cd6ed4ba750978e31c3a71a6071f95907eb86cd747266
font_01_sfnt_off0000db7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 11792 bytes
SHA-256: 0fe9429f170ae473674999991fd2a30e3d7a4b4c134e16dabadf87a221bad29f

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