Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5cb6dc01788065…

MALICIOUS

PDF

31.2 KB Created: 2020-06-08 21:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a822ae5b4593f117378c05387245944b SHA-1: accdd14826d6b236a17a21434e466f1d07b0d196 SHA-256: 1a5cb6dc01788065217f3d50750de0e6431e74ad301939b5a3a841bc1daa12c2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The embedded document body text, though partially garbled, contains a string that appears to be a URL, further supporting the link farm attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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 http://emmamariemacafee.com/uploads/1/3/0/8/130814439/130814439.html#podk%25C5%2582ady+muzyczne+mp3+chomikuj+nowo%25C5%259B
    • http://host67-131-77-199.static.ahcnm.org/uploads/1/3/0/6/130621277/vekeluvuli.pdf
    • http://capitalsecurityservices.com/uploads/1/3/1/4/131406867/6658dbca5b53a.pdf
    • http://xxlsportfishing.com/uploads/1/3/1/4/131437484/maxeduwalobix-diwege-bijejowiserego-wuxotitu.pdf
    • http://financialconsciousness.com/uploads/1/3/0/9/130969757/wifod-tamulexaz-wizawediwuf-botigo.pdf
    • https://tekudiraxopi.files.wordpress.com/2020/06/vivalipimefiwoposototu.pdf
    • https://lipurenipagu.files.wordpress.com/2020/06/90958238976.pdf
    • https://jowixen.files.wordpress.com/2020/06/91489335655.pdf
    • https://wiginikinu.files.wordpress.com/2020/06/sebexanigomefunitulow.pdf
    • https://misabuvewag.files.wordpress.com/2020/06/9869380301.pdf
    • https://lazozom.files.wordpress.com/2020/06/90658331645.pdf
    • https://bidazinefak.files.wordpress.com/2020/06/latubilew.pdf
    • https://patodulamup.files.wordpress.com/2020/06/wibilogifu.pdf
    • https://bebozuj.files.wordpress.com/2020/06/37287338184.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cfb.bin
c77c1f6e3d595535f33b9e942035ee1d8b7cdd4e7991b660582df9a2c3c5de7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CFB 10916 bytes

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