Malicious PDF — malware analysis report

Static analysis result for SHA-256 365a54ef706afaed…

MALICIOUS

PDF

69.5 KB Created: 2021-01-03 11:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d9a38e663ad0808572b2ce5c4dc12256 SHA-1: 215487043149e2102ead4774ad09071b5bb2220b SHA-256: 365a54ef706afaed98feda849811b395a7aa2cd112fe5da16235a3212198c860
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://traffnew.ru/123?utm_term=the+republic+of+plato+allan+bloom+second+edition PDF link annotation
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/3641349.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/f9d65f7c6.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/7e7a39.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/7c8d21b6.pdfIn PDF document text
    • https://wetifojijebene.weebly.com/uploads/1/3/4/4/134474841/866dd8602.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/nonipesikiri/tizujupikixubuluwuvit.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/bandar_malaysia_project.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/balerato_masione_new_album.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/mijibofukibagedi.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/nucleophilic_addition_for_aldehydes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ab316f-d67d-4b0d-bbf5-e6a7c484d558/zagorusisimu.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/metabolismo_de_proteinas_en_vacas_lecheras.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/coulomb_s_law_worksheet_answers_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/baazigar_video_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/grade_sheet_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/4359440828.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20E 5484 bytes
SHA-256: d31004b09adb18defda5e9c9fe666faa7718b392e374fccc35e73d544dfd0fe7
font_01_sfnt_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 10736 bytes
SHA-256: c2a9dae66ff443c45fec069be72ef2fbde5265b86d1e2dc9992cb018d63cad16

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