Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a93992091510f6f…

MALICIOUS

PDF

94.3 KB Created: 2020-11-19 20:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2d10eb5145cb9fbe4edebc0d000ce51f SHA-1: 12b75e80379bf16376dfb269493b16d7d6c016ff SHA-256: 4a93992091510f6f0484cb6d2a9fe7aa67ec17c435bc2b8b9d90c033a262a160
164 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. It uses an urgency-based lure. 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 0.9992

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/123?utm_term=nsca-cpt+exam+study+guide PDF link annotation
    • https://genifefesabido.weebly.com/uploads/1/3/3/9/133999330/wafekogitogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5fa156fbc98c3.pdfIn PDF document text
    • https://xizodekez.weebly.com/uploads/1/3/4/7/134769153/raniwenapinox.pdfIn PDF document text
    • https://wabanovawufefo.weebly.com/uploads/1/3/4/5/134587397/c72dd94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f9a0558554b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5f95d11de5d22.pdfIn PDF document text
    • https://pigasuranebuja.weebly.com/uploads/1/3/4/4/134459694/nenilosapeguna_furajigiw_papole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5f97d006248cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f93ff63e0fcc.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/9333919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f8edb421fcc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f9bff5f8d5a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e5a1e849-3b0e-404b-876d-eea78964d825/80453223146.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 5100 bytes
SHA-256: 1beed3440a6aa804e9d7488d20c355f70917560e7f08c4f82b7d04d25bdb5deb
font_01_sfnt_off0001174e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 1964 bytes
SHA-256: 6df601e85dfc90c946656797585dc8da0f3a5ae40063fe0974a1ee9a87c26c9f
font_02_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 11664 bytes
SHA-256: e74d66682900cf0fa97f4597849037b961f0bf9caa1ebe9c18bb4fdb5ac9ff5e
font_03_sfnt_off00014852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14852 16080 bytes
SHA-256: 28d5afbff6c2e9e687c0d9657fc0c8653379f131105490b33dc0c12c71f72ad8
font_04_sfnt_off00015d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D09 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.