Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1ca6836de4d16d…

MALICIOUS

PDF

70.9 KB Created: 2020-11-29 06:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d864794a683d558b98b97ef33d7e5973 SHA-1: 2b7abd40c9e4c5dff8db9f48bdf166793cf91433 SHA-256: 0f1ca6836de4d16dc906bd86ad042f4ca62fa26c326837203d2856b73d27cb09
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://traffking.ru/strik?utm_term=sns.set_style%2528+whitegrid+%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487622/normal_5fa955404b591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5fa3e15e20d48.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/rijirejuxof_zolerawurake_patinepotutejed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f9d8eece688e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5fc0b0e8c037c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f9492d4ca0f4.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/warapagefasovi/jumufosudowejunubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c7dc7e-e96e-4327-9a44-261cf6de0209/pigesasogipu.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/70749156343.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/kowexisofebav.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/th400_automatic_transmission_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/wedujosumulijasoguguri.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/kixasimag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79caff5e-2d3d-4b74-a50b-85ba257f6f9b/fufogexupajulizelixepe.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71A 5392 bytes
SHA-256: caf0f1093ae3d0dfea34c63eaa08398672145eb24beed28d685d8617edea4506
font_01_sfnt_off0000e99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 11132 bytes
SHA-256: 221fe613d9edd6c9c1486d8d50a4e203b96e995c4b80d2765aaa35e9aec357e8

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