Malicious PDF — malware analysis report

Static analysis result for SHA-256 69358ff11edc5298…

MALICIOUS

PDF

38.6 KB Created: 2020-03-25 02:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be888f10a980b01ed49c8799328b6b9a SHA-1: d45a87929748d051d35f32e2cc4b78aca84149b9 SHA-256: 69358ff11edc52982b85f8b2ed31c5c4bf211240f37e5396e0ad22607c67baaf
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were explicitly extracted, the embedded links themselves are the primary indicators of malicious intent, likely serving as a lure to external resources.

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 http://xrossingborders.net/uploads/1/3/0/7/130739308/130739308.html#balanza+de+pago+en+ingles
    • http://www.jackiewelch.com/uploads/1/3/0/4/130483819/tizarolobed_kimow_nafunosol_davasuwumum.pdf
    • http://hampaidenvalkaisu.net/uploads/1/3/0/2/130287493/576e5dc1a.pdf
    • http://www.twosunsdoula.com/uploads/1/3/0/6/130604815/bifosije-zediv-dugepovivofagu.pdf
    • http://samenzelfbouwen.nl/uploads/1/3/0/4/130483632/fisobodotofezogo.pdf
    • http://proanasel.com/uploads/1/3/1/0/131070255/9840109.pdf
    • http://marmiger.com/uploads/1/3/0/5/130542780/0b819a.pdf
    • http://tcmr-advogada.com/uploads/1/3/0/3/130379527/326652.pdf
    • http://yourweddingsolutions.com/uploads/1/3/0/6/130604694/1232191.pdf
    • http://www.jacquicouture.com/uploads/1/3/0/3/130323957/8637773.pdf
    • http://nsksstaffers.com/uploads/1/3/0/8/130814407/pojukofatuk_sapuwofixobelod_sapananomewi_jonomovete.pdf
    • http://listingsinthelehighvalley.com/uploads/1/3/0/2/130274291/vateterij.pdf
    • http://www.xcelerationfitness.online/uploads/1/3/0/4/130483519/reforojisusimimu.pdf
    • http://madeinmendocino.net/uploads/1/3/0/6/130604198/xitiwemapowagu-vobonisubofu.pdf
    • http://omegatestandtag.com/uploads/1/3/0/6/130604928/61f5acc4dc6d.pdf
    • http://www.rosewoodvilla.in/uploads/1/3/1/0/131071033/biniwuf_sulazijotepek.pdf
    • http://www.stjosephsbroomhouse.org.uk/uploads/1/3/0/3/130313262/abac73de0d70.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_off00006c80.bin
71d8ffe2371f566bdf70acd967d800c2b66fe6a7047432065323c72986d7e423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 8540 bytes

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