Malicious PDF — malware analysis report

Static analysis result for SHA-256 a808d98c0b18f8b9…

MALICIOUS

PDF

76.3 KB Created: 2021-02-26 21:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9b051fca33a44615f7eac5adc6222a35 SHA-1: 11b437e293ef23e1fc3ab0bb9f8ba7a75e3074fd SHA-256: a808d98c0b18f8b946b1266eeed4a899c52549f1f3558434c9afd4fdb4e0a1c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, contains text related to 'computer accessories store nearby' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure. The presence of multiple unknown reputation URLs further supports the malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9391

Heuristics 4

  • 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
  • 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://soxebez.ru/award?keyword=computer+accessories+store+nearby PDF link annotation
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/xonuv-guxudizefeza-givitoba-bareguxubute.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/59603878073.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/65334683760.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/tamorekugemikefaxukimekaw.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/how_to_convert_ipynb_file_to_py_file.pdfIn PDF document text
    • http://puxefesezosowej.22web.org/dowobebuvoletemelemudil.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/7505169026.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/8d0b77353a5.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/nazemika.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/altered_traits_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/23592708648.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/norakuni.pdfIn PDF document text
    • http://jekivuzogir.rf.gd/sovod.pdfIn PDF document text
    • http://pefodajisotavuk.rf.gd/android_screen_capture_without_power_button.pdfIn PDF document text

Related samples 8

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