Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfaa9e37aa66ed3…

MALICIOUS

PDF

102.8 KB Created: 2020-11-24 01:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: baca51922b9d99645e824e467a151c0e SHA-1: b3ea14799fc507dffa61da0fa5056e415e3a61b4 SHA-256: 1bfaa9e37aa66ed350e2ac7b5385c4a910ef3088d3f999a02ec748b7695779ab
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external resources, including a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a download button lure further supports this, suggesting the document is designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=naked+and+afraid+highest+psr In PDF document text
    • https://rugulobasogaje.weebly.com/uploads/1/3/4/7/134770789/benunopedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9de18b08980.pdfIn PDF document text
    • https://puwevifu.weebly.com/uploads/1/3/4/4/134465284/rufumodolisipokero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f8a0251f06a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_5faa16dcd2a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_5fa6132a484d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5fab663d38c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_5fb2fb5e2dfe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f89ef25bca6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f90a292c74c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f9c440d11aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f906dff645c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f9aa1240ecbd.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/dedinavesute/nerotibanizus.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_off00015637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15637 5304 bytes
SHA-256: 6e6d05e8f9c910ded4fb86f18490a6d32ca005deab3cc73b814221e67c58f3e1
font_01_sfnt_off0001684e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1684E 11172 bytes
SHA-256: 3075141b722b4fd58cb83c9c3a82942dc858d4aaf35521f4c1c65e092329b12c

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