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) First seen: 2020-09-04
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

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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 8996 bytes
SHA-256: 936e70dbcefea01332fef8470ead3b1c73c163cd7c0948b1b9b9c182256cc586
font_01_sfnt_off00008062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 2800 bytes
SHA-256: 9f5082701ede3b34412025578f3613d16372f7e661c8785cd8d7b7f4cdd3c0ca
font_02_sfnt_off00008a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A43 16060 bytes
SHA-256: b080e6aa9682ff87567a230b404ab00780bafcfd3ba11e3f536b788ca6e08ef5

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