Malicious PDF — malware analysis report

Static analysis result for SHA-256 7397ffe2b01ce391…

MALICIOUS

PDF

37.2 KB Created: 2020-06-04 00:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0494a8d7d8d6d1a9ef16a96c3832954d SHA-1: 1edc1518758c185e7e1b3b6f1ec63356e5d353af SHA-256: 7397ffe2b01ce391daddfe49106cca9e94989d7de6931655361d7e548c9f75ca
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to host malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body also contains a direct link to a page suggesting the download of cracked software, which is a common lure for malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://allergy.mediutopia.com/uploads/1/3/1/3/131384368/131384368.html#descargar+presto+13+full+++crack
    • http://nfpafireprotectiontanks.com/uploads/1/3/0/5/130543468/1c6d4d6f.pdf
    • http://cleaningstgeorge.com/uploads/1/3/0/9/130969888/6100355.pdf
    • http://mastergranitellc.com/uploads/1/3/1/3/131380531/6315880.pdf
    • http://ropewright.com/uploads/1/3/1/1/131164002/364586.pdf
    • http://mx.rossdillon.com/uploads/1/3/1/4/131437295/vodekelafu_vafojokojepoti.pdf
    • http://wjackdenningportfolio.com/uploads/1/3/1/0/131069838/3431467.pdf
    • http://andiesangels.com/uploads/1/3/1/6/131606094/3959420.pdf
    • http://caatje.blog/uploads/1/3/1/1/131163695/1248408.pdf
    • http://allergy.mediutopia.com/uploads/1/3/1/3/131384368/terms.html
    • http://allergy.mediutopia.com/uploads/1/3/1/3/131384368/dmca.html
    • http://allergy.mediutopia.com/uploads/1/3/1/3/131384368/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://velamejevar147843807.files.wordpress.com/2020/06/vapapavipewixifutawov.pdf
    • https://gerorixome653430236.files.wordpress.com/2020/06/dobekunabojewo.pdf
    • https://nokasoxesaxe.files.wordpress.com/2020/06/90252614903.pdf
    • https://nelilad488258350.files.wordpress.com/2020/06/46040766346.pdf
    • https://xepuzegazit.files.wordpress.com/2020/06/10486318188.pdf
    • https://kubuwenix.files.wordpress.com/2020/06/batikavuwafod.pdf
    • https://xifoburufo.files.wordpress.com/2020/06/97295701814.pdf
    • https://jubokukabuba.files.wordpress.com/2020/06/mivefagap.pdf
    • https://fewogixaba.files.wordpress.com/2020/06/6898853374.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ae.bin
78978dfb0d49607bccfead4bd7243479496b47aa633f639aff57c2da76f120e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 10896 bytes