Malicious PDF — malware analysis report

Static analysis result for SHA-256 1808003d6ee76d1a…

MALICIOUS

PDF

94.1 KB Created: 2020-12-07 23:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bcb6a75f29578e602decd2016281d8d6 SHA-1: 15c29f4d71bef6570472c48dd4ee955ef51ca063 SHA-256: 1808003d6ee76d1af97fb71e432f7b8ee2998a6587b41dcf900aed39c6657a6f
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=black+clover+captains In PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/sesilubukat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbffa571c8c7413142c9acf/t/5fccecc57ae85b53b2928c4a/1607265477475/59439767555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9c198a-32af-4e5f-aa42-3e623f7b8086/68398812426.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0da75085bf90c0efcd65a/t/5fc11bda9d79364840b4b814/1606491101861/66566156764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ac1bf2-6a9b-4276-bcb7-277f06d76a23/22568438089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a924345-2a70-45bf-964a-1e63c7558c01/22968839402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26447bb7-0112-47d5-b3ab-55370ef6dcee/vesawugejivazivet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67673aba-5598-45be-a1a0-4dd6551110cf/63219975591.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/55274110163.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e78bda9c57a97da122f/t/5fcd156f8a55f2188b7db6a9/1607275888246/73752065555.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0187aa5bc066edfa15e28/t/5fc320a0f81c9a2a0c08c702/1606623392845/46227571283.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB23 11596 bytes
SHA-256: 98aaf34416e08f9b269eca1be0316f0f4535c2f7cbb96e0290ba575ebb2b75eb
font_01_sfnt_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 4888 bytes
SHA-256: 8505189d7e18945e71fd5132b3a043a51897c4bd5c5c33e0d7c887743c9c4bca
font_02_sfnt_off0001118c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118C 3620 bytes
SHA-256: afb3aa0008a0c788fdc278363df226887a948baafae101e9e3db4ed9d7311970
font_03_sfnt_off00011f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8D 12004 bytes
SHA-256: bce3a5ba11492d3ea26250985f40ce8bb3fb789478c5757f9385c3ff0fbe7c81
font_04_sfnt_off00014748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14748 16244 bytes
SHA-256: d7e11d9e8d29756f22763503e8a8b53f0f8e09ecb76515a9e831bdfe848bbb25
font_05_sfnt_off00015c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C9E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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