Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0324c99f00549c…

MALICIOUS

PDF

66.8 KB Created: 2021-02-28 18:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fa23ad9cdd198c7fe5991f85c6d85e6f SHA-1: 2e4ec05c28c12d0e34b2f35144e66a1a9535dff9 SHA-256: 7a0324c99f00549c89aeae8c2af855499cac5ff533863b10ab7c0b81c6e4be4b
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9720

Heuristics 4

  • 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
  • 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://jottigo.ru/award?keyword=how+to+stop+hiccups+and+burps PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5fcd0b5dd980f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_602affb4c1329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_602b87879d657.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/armor_of_god_priscilla_shirer_dvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_600b797dd81be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_6005cc90772c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5ffe6ec997be1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fdf13e09f548.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/the_jewish_japanese_cookbook_and_how_to_raise_wolves_wiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482847/normal_5ff8709ed95c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5fdc6bab9c8e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5ffdacb537bc4.pdfIn PDF document text
    • https://nokatumevizo.weebly.com/uploads/1/3/2/7/132740479/9d2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_5fdc3718ba8d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463009/normal_5ff571648ff46.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/difigomisosak/webejolorojorikal.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 5320 bytes
SHA-256: 50838d9c9b374c4edeeff05ff043478422c65b3e8fb268f6c01d83510b04a32b