Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc024cc88f8770b6…

MALICIOUS

PDF

44.0 KB Created: 2020-06-13 12:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87a8facdf9f052ca0994db692ddacef SHA-1: dac0a22739e958e479f4f6d4a1555209da03a459 SHA-256: cc024cc88f8770b62ecb50660b24d1f137401633f14d0b3eb70b4715a8f498c9
92 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body contains obfuscated text and references to external URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://webmail.innovativecare4u.com/uploads/1/3/0/4/130476499/130476499.html#irm%25C3%25A3os+kratt+desenhos+animados
    • http://freedomjourneyfitness.com/uploads/1/3/0/4/130483429/5848095.pdf
    • http://keithlouwcounseling.com/uploads/1/3/0/2/130272606/27eef52a.pdf
    • http://emmadunne.com/uploads/1/3/0/4/130476587/17a48cfdd5.pdf
    • http://petroxholdingsinc.com/uploads/1/3/1/4/131438709/35067f666af8a2.pdf
    • http://mamasloveboutique.com/uploads/1/3/0/4/130490776/guwixojejigomem-kiwape.pdf
    • https://guvadade.files.wordpress.com/2020/06/23663497606.pdf
    • https://dilupojuze.files.wordpress.com/2020/06/41261485721.pdf
    • https://kupanireweru.files.wordpress.com/2020/06/34782913973.pdf
    • https://xewugof.files.wordpress.com/2020/06/nopotowofos.pdf
    • https://xodilufuva.files.wordpress.com/2020/06/rulitijanugena.pdf
    • https://kozurizavo.files.wordpress.com/2020/06/tekudube.pdf
    • https://wulinejasi72626276.files.wordpress.com/2020/06/63954391851.pdf
    • https://mujirarog.files.wordpress.com/2020/06/pejarusenadanipa.pdf
    • https://kubuwenix.files.wordpress.com/2020/06/xonoxizuwafodavukijoretuv.pdf
    • https://wobuzitij.files.wordpress.com/2020/06/95278425494.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b02.bin
52b31a9f592b7c437c2dd4b70ddd357a2ae80b1136b15f6d8107111cd73e3fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B02 16264 bytes
font_01_sfnt_off0000899f.bin
32c58b7e90e4e42de46ffaa8bc73eb87057f283728170b61a1513c6851952466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899F 17244 bytes

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