Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02abfab1394c67…

MALICIOUS

PDF

43.5 KB Created: 2020-04-06 05:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e5d1e5855353206aee53cdadc9f71f88 SHA-1: 83ff6ee47a20de9c5e441bf358e7c94be9ad447d SHA-256: 5e02abfab1394c6742171dcc82d629ccf4a781badb0b049971cd2261b9d4a034
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous external URLs suggest a tactic to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a dropper or downloader, likely leveraging T1059.007 if JavaScript is used internally for obfuscation or redirection, and T1566.001 as the likely initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9146268-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9146268-0
  • 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 http://bluemoon.services/uploads/1/3/1/4/131437348/131437348.html#formula+para+sacar+el+flujo+masico
    • http://lagodelrey.com/uploads/1/3/1/0/131070125/navuru-bupuvijiwev-nevumes.pdf
    • http://thebiscaynegardens.com/uploads/1/3/0/6/130604821/periweviduzuwa.pdf
    • http://investnurself.com/uploads/1/3/0/6/130620416/f97a790f7e1ca.pdf
    • http://condokey.online/uploads/1/3/0/8/130874119/7105245.pdf
    • http://madcowstickers.com/uploads/1/3/0/2/130272432/523edc7f8.pdf
    • http://ethanlogisticsllc.org/uploads/1/3/0/2/130289595/pofuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f54.bin
936e70dbcefea01332fef8470ead3b1c73c163cd7c0948b1b9b9c182256cc586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 8996 bytes
font_01_sfnt_off00008062.bin
9f5082701ede3b34412025578f3613d16372f7e661c8785cd8d7b7f4cdd3c0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 2800 bytes
font_02_sfnt_off00008a43.bin
b080e6aa9682ff87567a230b404ab00780bafcfd3ba11e3f536b788ca6e08ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A43 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.