Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86f2f92588ea97c…

MALICIOUS

PDF

85.9 KB Created: 2021-06-13 12:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d64055bae04d872ab7dbb85d6afd5a8d SHA-1: b0de93c50148cd9a8cec1da5d4615a916d6c454d SHA-256: d86f2f92588ea97cca24c813011565b2de0732a9e4c87348fc884284d9ac8d08
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mezovuduw.ru/123?utm_term=naming+alkanes+practice+with+answers+pdf PDF link annotation
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/5803b60dcc9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_5ff5615120d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_606e8ecf98595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_5fffa29b5312d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369334/normal_5fcd42e85994a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_606a1f92cd8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_6033e71d4fec8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491168/normal_5feee65b73a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_60bd95a52608c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5ff49a11471b1.pdfIn PDF document text
    • https://romidanunopupef.weebly.com/uploads/1/3/1/1/131163616/givopolopanum_vuseradori.pdfIn PDF document text
    • https://zumukematil.weebly.com/uploads/1/3/4/7/134716366/2c773.pdfIn PDF document text
    • https://kojiwoxoposegig.weebly.com/uploads/1/3/4/1/134108885/juruk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_5fc9917b9ba5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f73d567-6f7f-4a5b-9110-53020c4ad8e7/dyson_dc35_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1a5698-def2-4932-8068-f49b2b7a9851/72579730944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a609e2-cb2b-4936-ad92-2e954dc8a4fb/77245624117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1195c8-d45a-43a9-afd0-7dbc1a2e38a6/42518163613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c701191-2ed5-4ca3-89b1-24392b07393f/city_mini_gt_stroller_car_seat_adapter_graco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338da335-1560-4186-80c6-2fd990fb5ea8/1683151882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c3358d-e645-42f7-9fc1-6be1cedab832/jiberukomokuloropiviwu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 5692 bytes
SHA-256: cba2c792cc6e0750c424a42f68e5403217f7d2b8a4f078c5689e9811825ba58e
font_01_sfnt_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 11152 bytes
SHA-256: 735984c4038974904e6096194193bbb254249c1b2b79de6d90c321c4cab00b5b
font_02_sfnt_off0001353e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353E 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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