Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9fd4e0c66749f0…

MALICIOUS

PDF

61.3 KB Created: 2020-12-05 08:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49a90435d49b4b59f1786761a6121c25 SHA-1: 241ce94b5dfed498a8e7092612e02d8a57178285 SHA-256: db9fd4e0c66749f011d580c6cf69f138d91e3bddab38add5b3cd1193e0a2f595
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://traffset.ru/strik?utm_term=donald+pliner+boots+on+sale
    • https://static.s123-cdn-static.com/uploads/4377938/normal_5fcae849eb293.pdf
    • https://cdn-cms.f-static.net/uploads/4447630/normal_5fad547413c21.pdf
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5fb7819d05b9f.pdf
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f89692d73b91.pdf
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f88c8141bdf9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc37cc05e8e827d429e4280/t/5fc9d6ad6a94db17e49282c4/1607063214417/67125825249.pdf
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc3bfadbc819f1cf44ae3b7/1606664110912/29116985299.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd11987ad7de4c64a46b1a/1606226347205/32775885607.pdf
    • https://static1.squarespace.com/static/5fc0d96ebd14ff0dd29c6608/t/5fc27c5d7acac6192a11280f/1606581343531/disetimituj.pdf
    • https://s3.amazonaws.com/subud/juxevak.pdf
    • https://static1.squarespace.com/static/5fc4bfbf403f5353fdae5828/t/5fc7b44b5060c93fcd875b39/1606923340096/warlords_of_new_york_price.pdf
    • https://static1.squarespace.com/static/5fc36b8e2e537a05ef192680/t/5fc98df48d0ac92c7bda6843/1607044600299/9298177522.pdf
    • https://static1.squarespace.com/static/5fc2eceac6d96458362f573e/t/5fc4c89df81c9a2a0c3901cf/1606731933888/toefl_independent_writing_sample.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b30f.bin
24879bbedf4e708c09aa2acb7175b5c05f0468256d4e8e953a5c739768677f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB30F 4880 bytes
font_01_sfnt_off0000c39a.bin
2f0ab9399a7a34e86f1406d948b6dde2a42994537ce846670f409fe4bb95439f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC39A 9596 bytes
font_02_sfnt_off0000e45f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 4324 bytes

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