Malicious PDF — malware analysis report

Static analysis result for SHA-256 c499c19ce6f14f29…

MALICIOUS

PDF

68.9 KB Created: 2020-12-08 10:53:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f13a97d1b512056647076871a83a7a33 SHA-1: 158092bd9e6692f26b21d92552152b42d7534d77 SHA-256: c499c19ce6f14f295961a89db73e1697492820f29ed8c6609c1bf93e7f56d639
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://trafftec.ru/strik?utm_term=what+is+a+click+track+for+drummers PDF link annotation
    • https://jotigafipalat.weebly.com/uploads/1/3/4/8/134896518/162c34747d.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/gesopeza-kojelogitepe-mozipakawu-kijejezufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5c384116eb00e3c6d5904/t/5fccb5c07ae85b53b28e6144/1607251392863/83300410108.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e4d1ea4a794d565eb1ca/t/5fce206c24c49707d3478aa1/1607344237037/77134659039.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd05b7ee8e70759eb094/1606221061900/los_siete_pecados_capitales_temporada_2_cap_1_espaol_latino.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5818645712565431f26e/1606375449551/gre_essay_examples_reddit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a1cdea4a794d566579b2/t/5fc9ca1ae4017829c16ad6cc/1607059994914/75099079947.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/kukiruwonulof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a02ded1-8f07-4163-8b24-5bb93ccd9fba/cowboy_cha_cha_partner_dance.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f27ea13a450babf44921/t/5fc9cc814e3f3d25173ca33a/1607060613017/82482854114.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5141627a199023ad05ad4/t/5fc583cbcb3e0f57710c375d/1606779851408/jotamisoxuletif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2fc72f8b574a0f268fd/1606218493899/nanda_nursing_care_plan_2018.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BB 5340 bytes
SHA-256: 48eb9ad138dc7ed3e50ee18d46e07f308e9b1d749b4566d68e27d41ac79e634d
font_01_sfnt_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 10356 bytes
SHA-256: aa56e34877f96ba2ebd538d4e834994c1d7261a196e9ff68807b8515ef0f1b7f

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