Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d65b75209a33c81…

MALICIOUS

PDF

61.3 KB Created: 2021-02-27 01:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 25056811f02e3f18a51840859125edb7 SHA-1: 4c7ddfc5026039e6f40d690f619f3c666d3d842e SHA-256: 5d65b75209a33c81c194e294dcf3d62a199b28ec9bdd329cefedd51998992cd7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9697

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
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/award?keyword=juliette+marques+de+sade+pdf+descargar PDF link annotation
    • https://cdn.sqhk.co/nolovojawek/l5Ltieg/22405792940.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/84926544560.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/f17hd5W/tefapakawanajuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fd6c6563d2f6.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/56492225263.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/ghhifZX/asteroid_approaching_earth_feb_15_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_5fceb376e454c.pdfIn PDF document text
    • https://xenuwupe.weebly.com/uploads/1/3/5/3/135329542/goguzirido.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/Mhf2ghi/xevezidobavetikekenux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414689/normal_5ffe019663cc7.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/82675572048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_60264d07f22bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilepobafomunow.atwebpages.com/mapozuwuzatimow.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/cce_ka_full_form_bataye.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/zozowab.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/sample_bill_of_sale_for_car.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 5588 bytes
SHA-256: cf2de712696ab168024eb0203f95b3d8a87d7f688ae429a0de21a05cecc9ef32

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