Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e7ba9d6d62e565…

MALICIOUS

PDF

62.2 KB Created: 2020-12-04 00:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8277ca1b789a140c27c9db44b2757f SHA-1: 6869792a540ddcd035b9c9154e6453fb5b3a8d4c SHA-256: f3e7ba9d6d62e565d4155f0de4fb9e0ad00975bf0cc994b338a9650e814105f7
212 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded links, with a critical heuristic firing for a malicious redirector link. The presence of a link farm and ClamAV detection further supports malicious intent. While no scripts were extracted, the PDF structure and link farm suggest it's designed to lure users to malicious infrastructure, likely as part of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7469

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=narcissist+and+sexuality
    • https://pusenosegunilo.weebly.com/uploads/1/3/4/7/134705238/ac2a466bce3.pdf
    • https://lapedegino.weebly.com/uploads/1/3/4/6/134689006/terogosutumedel-ludemar-nawugobo-nevonabemoru.pdf
    • https://tulipigalid.weebly.com/uploads/1/3/4/3/134392473/xabumal_wezixuvu_sorubimowolun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ea01c56-fb32-4344-bfbf-b7cb61e12297/47746502049.pdf
    • https://static1.squarespace.com/static/5fc11fba3398ff75152f6203/t/5fc961acab0d1a26d959df21/1607033260875/brain_up_knowledge_app.pdf
    • https://s3.amazonaws.com/pibabopuduj/avery_5160_address_label_template.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf8ce3c6ccf69f3245cf9/1606285521288/80860905502.pdf
    • https://s3.amazonaws.com/tudawufed/banking_chronicle_magazine_november_2018.pdf
    • https://s3.amazonaws.com/varoximu/hack_wifi_root_apk.pdf
    • https://s3.amazonaws.com/zowejunef/54383789252.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd8.bin
86199e3e2c074c6cbf9259fbe66a751f3a9c6361dafe469fcd4ac6b2a5b26204		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 5072 bytes

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