Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e06bdcf060eb9e…

MALICIOUS

PDF

41.8 KB Created: 2020-11-07 21:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4d5df3cc1d0ca68a3e642b926efe4279 SHA-1: 9baf6112dc1898c9f1b63ddf9eb7263880c6c6e6 SHA-256: 14e06bdcf060eb9eeee4c575dffc51ce3c76e543778bebaf52b8a383a505e051
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/123?keyword=safety+1st+manga+fix+booster PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/winumigutam/bavubirasufudifiro.pdfIn PDF document text
    • https://fetejoj.files.wordpress.com/2020/11/39466545728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a74e8e-8a1c-4da4-9711-2911b714ccc1/lil_wayne_book.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/how_to_cite_a_handbook_apa_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265f00d4-bc8f-457f-bc11-858fe6b6161e/92965921353.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/72334096610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1519fc0b-2919-4e7c-bb55-f97ab2f8af29/34193722514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b084f6e7-541d-48f7-963e-ed70be98fda9/54678575381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb86ed6-b08c-49bd-bdb1-85963a206c00/82309772926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dca533-6013-42f7-9db6-e442975ceac6/61629188518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081552de-9f58-4516-b1a9-25c9c924ac30/82368782529.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_off00005c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 5520 bytes
SHA-256: 3a57ce03d56c4b37933bcc0ec6d1827b47d1da3caa98ea809a0874e4f94bff47
font_01_sfnt_off00006f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F51 12444 bytes
SHA-256: b4331c0346f66a9b1e017a318bc11d68df1431dae4dcc08445177f3654b24da0