Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2887dc03ce7c23a…

MALICIOUS

PDF

80.9 KB Created: 2020-11-24 07:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6dc46c6ee95db989a5f6b18f5f9e3fa1 SHA-1: 221c065942de1a67bec145958e2298f620db7668 SHA-256: e2887dc03ce7c23ad2982ecf23d51e6d701e4ec74ccb23212523829a22f0f52a
214 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 and routes users through malicious redirector infrastructure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=descargar+harry+potter+y+el+ni%25C3%25B1o+maldito+pdf+espa%25C3%25B1ol In PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/1115929.pdfIn PDF document text
    • https://vuxaxumiduwo.weebly.com/uploads/1/3/4/6/134603627/selewerog.pdfIn PDF document text
    • https://lemevepavakupe.weebly.com/uploads/1/3/4/7/134701524/7980683.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/mejifavo/gndu_result_2019_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/16456520211.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/52302415049.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/battery_saver_app_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/todowuluna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f113248b-b449-450e-a30d-2e2760e455ba/wunijuxujejikemidep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01e1219-cb9b-4c60-8427-f0ee55f0ffe0/17551631303.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_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 5880 bytes
SHA-256: 2c2880f4fa562ec6a3335d734bbb5b45f798a110339e56efe6a87090c565ebdf
font_01_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 11244 bytes
SHA-256: 691fad829422d5754e90f1f9050b72e224a876a6379c1f73ecdc4b04598c6df2

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