Malicious PDF — malware analysis report

Static analysis result for SHA-256 984e1d6450e48220…

MALICIOUS

PDF

66.3 KB Created: 2020-11-24 08:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eab9943f2369eedc5be5c623a6c4cc22 SHA-1: 9363699bae2df4e2b67cae9b4875b1f94dc8ca28 SHA-256: 984e1d6450e48220ece6fc10bcb919661aa140d4ddfc67fab789a20c6656317d
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=unblocked+agario+games+at+school PDF link annotation
    • https://xarirutufe.weebly.com/uploads/1/3/4/6/134659575/xawoxeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5faeb73013c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5fbc6133aebfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f8f2910cca41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f890f37f0421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f977fce995f8.pdfIn PDF document text
    • https://vamewufu.weebly.com/uploads/1/3/4/3/134317042/3741819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f96a6921af5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5fa81fdd6063c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8db3eba8004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5faa00d70e1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_5fba05d027f47.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/gakifuvakiveten_takojeros_gutafilusobifa_bokuvutepaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5fa1ff757e693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF6 3312 bytes
SHA-256: c88ef7d5082e8c1423c1c4eb3bf1416204c441dd7364fc5b581a6b6cd5458366
font_01_sfnt_off0000ba8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8C 5548 bytes
SHA-256: 5fe8fb663eb641f046a9bf41a2760c1d6ed71ec8c418aa7a117c4e63469be08b
font_02_sfnt_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 2356 bytes
SHA-256: 28f143b3865917608b41238889f2116c49685d204d50b77dcdf474a22cac7413
font_03_sfnt_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 10240 bytes
SHA-256: a5e8a47764e4198a09e2ca3f56bf39b9c45f12858aa55703fc74a5994150cf2f

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