Malicious PDF — malware analysis report

Static analysis result for SHA-256 225e11a621d232c0…

MALICIOUS

PDF

81.2 KB Created: 2020-12-26 04:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e5132f4ad28ae0d4ec8f85506602009b SHA-1: ea0b3f04d3f0c0654f484373a7a2aef38bc705f6 SHA-256: 225e11a621d232c0341b3bcb62432f351d5bf7e52a8d5584fc80f8d7a4b8b7f9
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://trafffe.ru/123?utm_term=ninja+training+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/mejapevelu/yjcOSvY/batekivemid.pdfIn PDF document text
    • https://luvumape.weebly.com/uploads/1/3/4/4/134438520/4496056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/398de379-3531-4b22-a465-234d4e703f90/nizema.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/aperture_science_font.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/18744329387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55de7473-484b-43a5-ac5d-bdcfd7478ff5/jakidalexugusekisafukizur.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/xirol.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/86696634585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85316a4a-569e-4cc5-89ca-07e837cc7a6f/security_code_generator_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/difowelasopi.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/direito_processual_civil_atos_processuais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/631ccff1-f60d-4e90-91c9-16125238c78d/daxesujovoniromaxegibu.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_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 4396 bytes
SHA-256: 3c2187ceb6031759546563f5b5321ac422cf0e7aa87c6e6cd1526065ed13be13
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 5228 bytes
SHA-256: 14e197e414ac708f7d0e8547d692f4fe752ba721bea04320bf6ff3f89a1c52c4
font_02_sfnt_off000112bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BC 10952 bytes
SHA-256: 6b376fa885c930e146700a46393952b68a2e005cb05e1b5339ba5d18c3223371

Open this report in the interactive analyzer, or submit your own file for analysis.