Malicious PDF — malware analysis report

Static analysis result for SHA-256 017cce2e27230a8b…

MALICIOUS

PDF

42.2 KB Created: 2020-11-06 21:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d497ffdc8a47a1cfe9b23937b18f926 SHA-1: 1bb6e4bd934a1894faad1a291b1f7f96edd1b221 SHA-256: 017cce2e27230a8bfdfbeb2510061ba5c33e6a8606594cdc391bf68c402aaf57
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that points to a suspicious domain, identified by the PDF_URI heuristic. The ML classifier also flagged the document as malicious with high confidence. The document body contains text and URLs, suggesting an attempt to manipulate search engine results or trick users into visiting a malicious site.

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://trafffe.ru/123?keyword=i+need+scissors+61+meaning
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f9fd19cf325e.pdf
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f88a20f22188.pdf
    • https://rofetidol.weebly.com/uploads/1/3/4/3/134322454/pogusizizugajofe.pdf
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5f98344aaff0d.pdf
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8d02dbbf242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6401f94c-a85a-4dfe-b76c-f286c1e66289/what_beautiful_name_it_is_chords.pdf
    • https://uploads.strikinglycdn.com/files/ef9f4b12-c550-49ee-873f-cbc1b1329cba/kowirudixodojolumezoxawo.pdf
    • https://dogisur.files.wordpress.com/2020/11/59972366129.pdf
    • https://tojovaw651389336.files.wordpress.com/2020/11/15134477711.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba5.bin
4cf732edccfc599a4e4564f402dce8e10edcc941adfc1c4860bfd4ffb4fc82aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA5 5080 bytes
font_01_sfnt_off00006cbd.bin
a3762df8fc24d78e0bde5b79aa27fdf12195aebfe7fec9e8f8cf6a8a4647bcda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 9900 bytes
font_02_sfnt_off00008e98.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 4324 bytes

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