Malicious PDF — malware analysis report

Static analysis result for SHA-256 04257e2e719f4416…

MALICIOUS

PDF

70.7 KB Created: 2021-01-02 15:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fe3f44c30e080d084d94b8e9ee33b0c4 SHA-1: 362bb116a43e2c288429be793a9773f1a0677d73 SHA-256: 04257e2e719f441665a6c883feafc1be71d8f96789b8c379c72ff394196487cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a mass of external links, including one to 'traffnew.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to 'art sculpture garden near me'. The presence of PDF_SEO_LINK_FARM and PDF_URI heuristics indicates the primary function is to redirect users to external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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/wb?keyword=art%20sculpture%20garden%20near%20me PDF link annotation
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/c2e143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5fe07f613bc76.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/xanunafojuloki/amman_bakthi_padalgal_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/autotune_pro_free_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3ee54d-b7ba-4069-860d-30c3e3070155/vesuwox.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/le_pont_mirabeau_apollinaire.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/45553924462.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/67300746592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3de14a0-6694-498f-9e3c-71ffc4471345/minecraft_wiki_piglin_bastion.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/6884700499.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_off0000d8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AB 5380 bytes
SHA-256: ed050ce4007f367e54d6c6e73414cb0b86246b03369c2b72114ecf9c30104a03
font_01_sfnt_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 10800 bytes
SHA-256: 4a961a38f6052c442c1b00d704b7d7fee55ac5030de674819c8d02b2b6f76611

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