Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee50bdcdfdcf895…

MALICIOUS

PDF

50.0 KB Created: 2020-11-08 14:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a9aed88d582ba084743070a0bc0f6979 SHA-1: 2e63a510f4d8a96ffaa9497c8ba5465f42cd0990 SHA-256: 1ee50bdcdfdcf895be96d6d89d233ae20b221c62d6bae458da817b5c1e754de5
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 1.0000

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://trafftec.ru/aws?keyword=dexed+vst+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f952607a51b2.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/2379114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5f9c7498d54c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f99b2c1841e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f8861a6ebe8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5f98bdd7a97c0.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/b79c4994452f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f9f21b232d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f87e91801642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f897ac3aa10d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wopari/roluxuloton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8213e83-7fb7-448d-8a50-011abf6069a1/17026420995.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/senior_designer_salary_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bd0390-c330-4fe4-8456-abc1ff558078/falewejuxuj.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_off0000876f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876F 5000 bytes
SHA-256: 62275b0819313e0534929ed77d6ff5f133e9c131993b22e2133f331be02c1078
font_01_sfnt_off00009868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9868 10308 bytes
SHA-256: 8473f1b931b0874e32946d5124c83edcac0dd6aa643e98e95a0bce6c4e41e060

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