Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97b532865106310…

MALICIOUS

PDF

97.8 KB Created: 2020-03-29 21:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e68032aea3ed9318f11117e63edffdbf SHA-1: 19cf74b911a843b5cbdc7155912552d891399d38 SHA-256: e97b5328651063102911ffdfa2a11078d84995302102271366f768db713d2eda
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to host malicious content. The ML classifier strongly indicated maliciousness. The document body contains a deceptive title, 'Cast of maverick episode duel at sundown', which is likely a lure to encourage clicks on the numerous embedded URLs.

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://www.brchwear.com/uploads/1/3/0/6/130621940/130621940.html#cast+of+maverick+episode+duel+at+sundown
    • http://weily101.com/uploads/1/3/1/1/131164418/98dea6eb4785b.pdf
    • http://angelcomfort.net/uploads/1/3/0/7/130775835/lipamuvawenozez.pdf
    • http://moneywealth.org/uploads/1/3/0/5/130588718/jivirazavuvosudo.pdf
    • http://womeninlawny.com/uploads/1/3/1/1/131164474/2982411.pdf
    • http://hostmaster.espressowilltravel.com/uploads/1/3/0/9/130969967/5347156.pdf
    • http://vancouverfreediving.net/uploads/1/3/0/8/130813550/c69f14ed704.pdf
    • http://kleekaiminitoyhuskies.org/uploads/1/3/0/5/130589384/tabix-tolowologudavoj-tutugemowonolig-sixonopogazopog.pdf
    • http://iraair.com/uploads/1/3/0/6/130621636/pubuxu.pdf
    • http://njcirrigationsolutions.com/uploads/1/3/0/5/130545011/zanataparix.pdf
    • http://communitybroadbandpartners.com/uploads/1/3/0/2/130289224/xuzenovaki.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_off000157cb.bin
b8333975cd00e5333bfc903893f7a20ef53e4aab25446400e9bd0535aefde096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157CB 8980 bytes

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