Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dbd407a8125332…

MALICIOUS

PDF

72.8 KB Created: 2020-11-16 20:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0cc3fb20c3597cb283cd1ad18726ddf2 SHA-1: 2c4cf748443cf803b6b75e11449af5ea89b74899 SHA-256: 65dbd407a812533263a5a6e32573722070f468a68433d03a871c6109fba8b3e5
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install 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 0.9997

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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/strik?utm_term=how+to+sync+chrome+bookmarks PDF link annotation
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/8410495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fae62a835255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f99df4dc7374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f8c005a64db0.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/lakadax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39da5aea-02f6-45c2-bfbc-b07a28209d7a/75204749049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5331d52-2629-4225-a5e2-6441e78642ae/ssis_data_types_long.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/panelujawuribojosopip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603579e5-3e73-4994-a669-588c228b3775/94928106925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eacab58-e291-434b-8800-3be4622003b7/mebizuraki.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/escuela_secundaria_tecnica_21.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/54860476161.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 5368 bytes
SHA-256: c6e760a7985cd70b79a277c1dc02a1b4f83e6b0f4fff8cab38ad794ff3def55d
font_01_sfnt_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 10420 bytes
SHA-256: 5a17772b37cc9cbaf315080695dce5ebecf43892497d0ee16b21fc4dd306a7fe
font_02_sfnt_off0001011b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011B 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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