Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddb4f5963f4c07e…

MALICIOUS

PDF

62.0 KB Created: 2020-11-17 23:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a6c48d5d8126e428bb8a9bc19f2b6d0 SHA-1: ba060f42abf282b77ccfe9b4fd9eeba3741795d3 SHA-256: 0ddb4f5963f4c07e732433b9ad766e78e24bf7283f5e2a1c9a6e272ed45bf41c
164 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=clock+template+ks1 PDF link annotation
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://defonufagij.weebly.com/uploads/1/3/4/3/134360363/3240ab96048475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f9771e1e50c4.pdfIn PDF document text
    • https://zunesevofulopu.weebly.com/uploads/1/3/4/3/134385883/movikujunerak_veninafapuni_xifuxibi_tiwuba.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/baposivarabuj/justin_timberlake_instagram_post.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/massachusetts_driving_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/spiderman_compression_shirt_long_sleeve.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/83001022905.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/dogomus.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/blank_calendar_november_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/who_viewed_my_instagram_video_app.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/46713486849.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_off0000b7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A1 5004 bytes
SHA-256: 20b504c7862f4d23d42d3a494e68961a59798fee2b082e5cb12ba2bfa01122fc
font_01_sfnt_off0000c896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC896 10312 bytes
SHA-256: 8f7aaaa7d9b078cb382b8cff7caffd21611bc4240cbe250b39c6895faf4d0365

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