Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4c17f643d21552…

MALICIOUS

PDF

84.4 KB Created: 2021-03-22 21:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7abccbc9cefcba845033706d47c016c8 SHA-1: 14f0dba888442538f6c25989ee9a3e73377706d7 SHA-256: ee4c17f643d215521e11970118e2bc374bc622df49fcaddd3f95736b6b193baa
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://baarspo.ru/strik?utm_term=what+kind+of+jobs+do+international+business+majors+get PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491723/normal_60461f586fb3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcc365b99fe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486193/normal_5ffac79bedf37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_603df1ffa2efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_600afad08fba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464314/normal_6031e5c4126ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470843/normal_603a43332a643.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/gTehjKU/olympics_2016_basketball_winner.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/P3tjcjb/29239570002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460678/normal_5fdbd7165e48d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_6033a35762c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_604ac7a393a99.pdfIn PDF document text
    • https://rasafidi.weebly.com/uploads/1/3/0/7/130776861/zisanejenunosonal.pdfIn PDF document text
    • https://domalaxugopomi.weebly.com/uploads/1/3/4/6/134606687/22a2c7e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6017a2baf35e4.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/tuxenipup/vojewokozavoxeraved.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/european_commission_french_style_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/gumubafuxativokudun.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/toluxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/nemotalakofemupafixoz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 5616 bytes
SHA-256: f3ce1fd490cd01fe5986b5588a0074bd751f4cd3c48023a97b6cc62ef478b104
font_01_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 10948 bytes
SHA-256: 0b86a1e204090cf7379c40523f11047a75806a50dfeec227b1fcfe3502273d76
font_02_sfnt_off00012ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE8 16060 bytes
SHA-256: 2d97eb5b8c66583654a55461b75ebc9d5954fe3bb26bfbf5761d5bfdae6bb250

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