Malicious PDF — malware analysis report

Static analysis result for SHA-256 3984b1a422a9adea…

MALICIOUS

PDF

30.6 KB Created: 2020-06-04 18:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb2a42594c011d9b2a4dcb02f59cad8c SHA-1: 74bb65739e3ba9c8e4cfe5e91034c80ce3b60f8c SHA-256: 3984b1a422a9adea1929d425e987fdb28aed74904094a8fc07d46df690b432a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains several of these URLs, suggesting the primary purpose is to redirect users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://lgcustomtravel.voyagerwebsites.com/uploads/1/3/0/6/130621437/130621437.html#champagne+stjernekastere+amazon
    • http://blackswanpremium.com/uploads/1/3/0/3/130323675/7348064.pdf
    • http://bulletandco.com/uploads/1/3/0/4/130476458/notisu-pepunabuzaxawe-debewaloruji-vubulunozovef.pdf
    • http://peibiker.com/uploads/1/3/0/7/130740018/9071731.pdf
    • http://baezbaez.com/uploads/1/3/0/4/130476098/c3882c9c97.pdf
    • http://collegeprep101.org/uploads/1/3/0/7/130739835/4074672.pdf
    • http://teebaggolf.com/uploads/1/3/0/6/130603894/7480532.pdf
    • http://thissideoftherainbow.net/uploads/1/3/0/6/130640092/09aba459b.pdf
    • http://navslaborers.org/uploads/1/3/0/7/130739776/dizisizexawuxetuziz.pdf
    • http://jerrywilmes.com/uploads/1/3/0/2/130289603/5208681.pdf
    • http://bobjgearforbusiness.com/uploads/1/3/0/6/130604259/f89d9f609.pdf
    • http://columbiarei.com/uploads/1/3/0/4/130436271/gabezaxe.pdf
    • http://stuffedcart.com/uploads/1/3/0/8/130874372/98938d4.pdf
    • http://marcquateau.be/uploads/1/3/1/0/131070527/5708220.pdf
    • http://poematizate.com/uploads/1/3/0/3/130324075/livosogeg-mugakanajasib-sebotegomexapi-sugaroboniw.pdf
    • http://lgcustomtravel.voyagerwebsites.com/uploads/1/3/0/6/130621437/terms.html
    • http://lgcustomtravel.voyagerwebsites.com/uploads/1/3/0/6/130621437/dmca.html
    • http://lgcustomtravel.voyagerwebsites.com/uploads/1/3/0/6/130621437/policy.html
    • https://susudamasot.files.wordpress.com/2020/06/869274230.pdf
    • https://suzuwukukul.files.wordpress.com/2020/06/fokuruxaxejisisoku.pdf
    • https://golarunujoki490965438.files.wordpress.com/2020/06/18639308858.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_off00004e2c.bin
25d2737ad2f611f6650b60237999957a394cd6fd27b271dea37865c9ab7df7e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2C 9248 bytes