Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcedf3e5d5f8fe8…

MALICIOUS

PDF

34.7 KB Created: 2020-04-19 21:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1ee150c293e76edbccc4bc5eba9c5225 SHA-1: d3d84d380d7f35ed3a84ede35892c4c425fed43a SHA-256: 0dcedf3e5d5f8fe89d952e78c54e418c5574697b0df3693c04612fc2af6b7213
104 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure further supports a malicious intent. The document likely serves as a lure to direct users to external resources that may host further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://claudeyvanconneart.studio/uploads/1/3/0/4/130476607/130476607.html#scratch+2+offline+editor++for+mac
    • http://necdm.org/uploads/1/3/1/0/131071038/5224688.pdf
    • http://connect2riki.com/uploads/1/3/0/2/130272582/8950908.pdf
    • http://aaconsultingservices.org/uploads/1/3/0/6/130621281/xezezevunasex.pdf
    • http://cakesbykassandra.com/uploads/1/3/0/4/130435553/bowomikajuze-susikadawuxola-wexove-jepusi.pdf
    • http://distribuidoraextra.co/uploads/1/3/0/5/130545895/neseletuzobud.pdf
    • http://duelmotions.com/uploads/1/3/1/1/131163658/toxexe.pdf
    • http://gopepo.com/uploads/1/3/1/1/131164313/86ba617230951c.pdf
    • http://jlgaproperties.com/uploads/1/3/0/6/130620926/3439495.pdf
    • http://xenoverse.org/uploads/1/3/1/0/131070301/vowewebaniwot_kubiju_modarezixetenaw.pdf
    • http://sookeyhairextensions.com/uploads/1/3/0/5/130551671/sopaterunolatidoxel.pdf
    • http://twgafc.net/uploads/1/3/0/6/130639842/d2751e1db.pdf
    • http://mountainwomon.com/uploads/1/3/0/2/130270762/wexotupipo.pdf
    • http://rusted1.org/uploads/1/3/0/6/130604020/790425.pdf
    • http://trumpdisciple.org/uploads/1/3/1/3/131383746/ravimexefosa-pulegebodulaw.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_off000060c0.bin
5bdad6c63a743e33081104e73ae2de8ebc78f210053c6a931c62ac6d624b85b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 7696 bytes

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