Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db3c362e6a060cf…

MALICIOUS

PDF

42.1 KB Created: 2020-11-09 14:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6910fea4022055748d015d0fb0da7496 SHA-1: dc967ed87d8906cd16a88be3f58aebc90ea5c784 SHA-256: 8db3c362e6a060cffd9323ce04314f04f3b51e4f0cecc626aefccf02e03ab800
96 Risk Score

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://trafffi.ru/strik?keyword=ultimate+wilderness+pathfinder+pdf PDF link annotation
    • https://ziwodenitisal.weebly.com/uploads/1/3/4/3/134350364/d822ea.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/puludoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5f938beb39aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8b1669af5b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f870763bfec7.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/maladafowerosuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_5fa079abd3104.pdfIn PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/2830f6c.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/3828490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5f97341ca15cd.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/cd44117e-7fb9-4828-b40b-fafdb12177e3/wigimefal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8496ac9-02fa-4ef4-b8c9-d8d573236426/51675911019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d924e08-feae-48d6-83a9-b4202afabe4d/6659019647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d271eb-c8bd-45e8-b291-54cdb6413e2d/1391975439.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_off00006634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6634 5364 bytes
SHA-256: b7ebd50865da5a2ea72f349ae28931b1a4019257874cca5bca5fbe003e3f6988
font_01_sfnt_off00007859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 10136 bytes
SHA-256: df2c047c4535691e03dd8fe0468d9ffb02e8e1f3a36762d35d7b9512df376f03