Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c06df614e8154f…

MALICIOUS

PDF

68.8 KB Created: 2020-12-03 00:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9314c0b2a02c1407c72632d4671a94d5 SHA-1: 9c69a91fba0230fd7520c9f41b46e0d7bbdfe9da SHA-256: 17c06df614e8154f0cd472698298b64206d01e6387b8f63254f3a83dd764edbc
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 0.9998

Heuristics 5

  • 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
  • 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://trafffi.ru/strik?utm_term=supporting+details+in+a+paragraph PDF link annotation
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/zetisitude-sirorer-nizoba-loxolupe.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/dabid.pdfIn PDF document text
    • https://xepuduwosijun.weebly.com/uploads/1/3/4/6/134634987/movebitexanuzav_dufaw_juwexuvobilizi.pdfIn PDF document text
    • https://dosarowit.weebly.com/uploads/1/3/4/3/134315771/4196dd05dea7.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/fivakim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5fbe9138e8931.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/jukifegedane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2a2022e34347c704f3ef4/t/5fc65b89f8cdb769c6bcba3e/1606835085887/18690529192.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f004e98326c02d8c414/1606295298104/annapolis_middle_school_rating.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc292fabda9c57a97c8d54c/t/5fc503caf8cdb769c6810254/1606747082839/56906882885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5866e9b-81b1-47d5-9ba4-2c7eb9c230ed/49948159296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2cddc3f-97ff-47e4-a71d-ec6b23f06059/zisevuxapuvuxasizajiman.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc17b55173fb5383bdae05c/1606515542098/fapupuzuwezezilamirujew.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD070 5324 bytes
SHA-256: 102b81d7a366fc4e004d2234f7b95d8319520d3a3cc21b6799c68f066cc77faf
font_01_sfnt_off0000e27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27F 10576 bytes
SHA-256: e97050be439bb2fce56773d8674a49cec0929910033b85c5d5fc274f9f650bad

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