Malicious PDF — malware analysis report

Static analysis result for SHA-256 732c26b0e55a58f3…

MALICIOUS

PDF

70.6 KB Created: 2020-11-21 12:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c5a41350987e9c65b838380cc4885843 SHA-1: 9d8cbba035cf0b22957f2078476949fd6edd3923 SHA-256: 732c26b0e55a58f3ab459dab66966ed6487b337975cd02b4ab8c020f621c5f43
96 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 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 0.9995

Heuristics 4

  • 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://traffking.ru/123?utm_term=etapa+in+english+means PDF link annotation
    • https://fosuzotarodaduv.weebly.com/uploads/1/3/4/3/134391180/2239720.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://tejubodefi.weebly.com/uploads/1/3/4/3/134351051/rolavoxole-noret-binepeniji-fugujurunijefa.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/1cd25a1a-f622-45a9-934e-cb57d3cf45e2/mijatavorib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb6ff68-3e8b-4ebc-b507-494b7f2294fd/zozexavelidazafadibiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9e2e29-b546-40fa-8cdd-e4cba7d3d77f/pavubekizajomapet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89afd08-61cb-4ef6-9f6d-9f2d2066599f/stations_of_the_cross_script_for_youth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46613078-f0b4-4030-a4eb-f3d1df890e42/duvedawup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e070e631-5403-46c9-831b-3c8a43612dab/zogesajeruforivos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5825be02-1c42-4317-8dff-fcaa01f72300/54644963044.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC481 5092 bytes
SHA-256: e0c413befeb2eac9e1bcc71e30d38bfbaebd1a02e58d771ed96750d85a74b20b
font_01_sfnt_off0000d5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B7 10300 bytes
SHA-256: a4913c78b2988c7edde72bd72a55f3b0019bef7d278d467c6fdea71934232ce0
font_02_sfnt_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 16068 bytes
SHA-256: b87f97ee19d0eebf852dd88b0ab32469aeb165aad349e9abc0ff3cff3eb64326

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