Malicious PDF — malware analysis report

Static analysis result for SHA-256 997e8a11cfd7df7c…

MALICIOUS

PDF

40.7 KB Created: 2020-05-23 22:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0402921b14b97645af98162c2586754e SHA-1: d53f8c443b5fa3ae4348e2301d3956d60dab4a71 SHA-256: 997e8a11cfd7df7c86d3a689fffc9b2ca486acd8e7acede762cd5cafb7079a8c
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://charmingworldtours.voyagerwebsites.com/uploads/1/3/1/4/131407028/131407028.html#works+with+nest+list
    • http://belleofthebash.com/uploads/1/3/1/4/131437967/180c818b.pdf
    • http://technologytransfe.com/uploads/1/3/0/6/130639216/c4b1b5b8.pdf
    • http://makepascohome.net/uploads/1/3/0/7/130775436/kilod-gubokaja.pdf
    • http://gretalmay.com/uploads/1/3/0/4/130489229/5170538.pdf
    • http://ikurasushipoway.com/uploads/1/3/1/1/131163751/tusisubivije.pdf
    • http://wyocityopen.com/uploads/1/3/0/6/130639481/tulifupuwifujid.pdf
    • http://narasusu.store/uploads/1/3/1/3/131381761/8e41ee2e.pdf
    • http://savagesrecords.com/uploads/1/3/1/4/131409909/xujuxudoneb-bomojesufa-tazonupar-dufaru.pdf
    • http://lostsuppers.com/uploads/1/3/0/9/130968912/ccc43336ad3e.pdf
    • http://uptownsafarigallery.com/uploads/1/3/0/5/130539465/nitekawi.pdf
    • http://brightwaylearningcenter.com/uploads/1/3/0/6/130605113/8c77b98c33463.pdf
    • http://bucklesrvsales.com/uploads/1/3/0/4/130476370/4206571.pdf
    • http://rockstarpricing.net/uploads/1/3/0/2/130291539/gusajuvika.pdf
    • http://mylunarsign.com/uploads/1/3/0/4/130476237/6970957eea04e9c.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_off00007594.bin
78aeca4f7ff30392d14b0cd7aad6f583207e10aa2c646e3d188970ac1d39a61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 10024 bytes

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