Malicious PDF — malware analysis report

Static analysis result for SHA-256 d497713e5ac1e167…

MALICIOUS

PDF

70.4 KB Created: 2020-12-23 11:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 22277e94393d2617b8556e6b66fffa76 SHA-1: 907620ec36770d6f0f66342fb44e7248aea886f8 SHA-256: d497713e5ac1e167219b0334a33729d2b7fb36c469637d5e2abb15172a771888
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://trafftec.ru/123?utm_term=revelation+online+guide PDF link annotation
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/2349903.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482623/normal_5fcfa93292287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5f9f1cd6d3efa.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://s3.amazonaws.com/zetare/widuderewuzokumese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57a5927-25d0-428e-b8cf-b7b91a4e4c6b/rinebaxafirikevonunovuw.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/41572030475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f911ba2b-93cc-4950-9414-1df8d6144948/18955169726.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/vozap.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/66000851556.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/prism_and_pyramid_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/oceans_hillsong_free_sheet_music.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 4668 bytes
SHA-256: d5f0eb2fabd3d14741ad46cd90201ef7f479c2eae602423aebee3b068e74ac3a
font_01_sfnt_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 10788 bytes
SHA-256: 999b11e522200bb445df38c1800d966c250f10c4319a5884d33aa8fc08a82ca0
font_02_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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