Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ef432e513f3bcb…

MALICIOUS

PDF

72.9 KB Created: 2020-11-10 08:14:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1032b19d72935112070e5ef59f1d8c6d SHA-1: 11c41d28062ae87325caaefbce38d3f7b3b7f4c0 SHA-256: a6ef432e513f3bcb09533fcf7314069a4afe1c80f7ad8a6d9ed64b8964acd660
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 0.9998

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://trafffe.ru/123?keyword=minecraft+bedrock+hack+client+addon PDF link annotation
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/fetebum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f873a7d0c302.pdfIn PDF document text
    • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/2981022.pdfIn PDF document text
    • https://takimibovejexi.weebly.com/uploads/1/3/4/5/134512521/kesezutumapaj-vorazon-gozuzuponokawu.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/5837140.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/d63296d0d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f91c170a8409.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/foneniz/alison_victoria_married_daniel.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/22880789565.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/93370827908.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/96951144809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affcbbd4-539d-47d4-92b8-2f57036c8b50/93780133021.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/nimivasod.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/67252852571.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/feedback_robison_wells.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_off0000ca82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA82 5140 bytes
SHA-256: 2ee35ace701f8df142c7bd02555dae25e44d8ff3337d8abe0b713103075920a6
font_01_sfnt_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 11072 bytes
SHA-256: 067c49f0f76822fecc3790b11cbdba4b34efbbc8e048ffe8eb1117290f416e1b
font_02_sfnt_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 16080 bytes
SHA-256: 8f6ddafd3b0ce2004b9503adf603897a58143e210ca714e8dcfcba1b249cf112

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