Malicious PDF — malware analysis report

Static analysis result for SHA-256 514eec3f9a8a25d3…

MALICIOUS

PDF

71.2 KB Created: 2021-05-18 09:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f9679cb9f3714d81842ffc58eac8a993 SHA-1: c17d20acef368672ef8781767bd2d31377fc075d SHA-256: 514eec3f9a8a25d3881f83a6e5460a61836021c26385ac4d301503b2be34a71d
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://cdn-cms.f-static.net/uploads/4445869/normal_605eebfe130b6.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_5fd90318821f5.pdfIn PDF document text
    • https://zajodufukotu.weebly.com/uploads/1/3/1/8/131857357/gukodobulozuril.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6024a0ee53476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_600b3c8ad1155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_60616a6652ca6.pdfIn PDF document text
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/88f16b52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5fdd43d51e2bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=principles%20of%20economics%20mankiw%208th%20edition%20pptPDF link annotation
    • https://uploads.strikinglycdn.com/files/c93f7b76-38c7-4631-a54b-fc6a4942e67d/bimejefumajagu.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/massey_ferguson_tractor_135_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/general_motors_company_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/automate_boring_stuff_with_python_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/anet_a8_setup_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed3e3ba-8fdb-4ef6-8493-b2a4c1ae3a82/zojibitujonadaxuxanurasiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/kekul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542c76cf-0bb4-43cb-bf9b-fc72c9d1558f/how_to_cook_brown_rice_in_pressure_cooker_indian_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e765c2c8-571d-4cf4-a89c-a02aa688e9fe/bosch_axxis_washer_maintenance.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_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 5532 bytes
SHA-256: 278f5f6edd68f1edac489304f0bf508fac443a017327abe1f1dcae15a2d3bf43