Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66e754a3ae99b78…

MALICIOUS

PDF

62.2 KB Created: 2020-04-08 14:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9488910fd9bc8150b173dedad41c498 SHA-1: de82f9cc029f40762ad1cf9e2665dea8a6da0443 SHA-256: c66e754a3ae99b78c4b2973ccf15ba1d2ba77db80ff64a52e7d2819e6e3a3ba9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these external sites. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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://deceptivelysimple.com/uploads/1/3/1/3/131383305/131383305.html#wintv+v7+serial
    • http://ness-bud.pl/uploads/1/3/0/6/130604856/tibedevovorimo-sikosip-leroz.pdf
    • http://brownstonewoodfloors.com/uploads/1/3/0/7/130740412/ffc24919.pdf
    • http://essegiasrl.it/uploads/1/3/0/5/130588168/felaraz-kenofakujumigej.pdf
    • http://beachviewtravelagency.com/uploads/1/3/0/6/130621850/ac1e0d.pdf
    • http://mariabraganini.com/uploads/1/3/0/3/130312998/8897777.pdf
    • http://dementiacareqb.com/uploads/1/3/1/0/131070858/dbff91cfa.pdf
    • http://hilltoharbor.com/uploads/1/3/0/7/130740054/mabewudar.pdf
    • http://tipsystarquilts.com/uploads/1/3/0/7/130738715/2686138.pdf
    • http://gaydisaster.net/uploads/1/3/0/5/130540795/nemabifi.pdf
    • http://slmediaconsultants.net/uploads/1/3/0/7/130775229/bbc11605b.pdf
    • http://craftitunique.com/uploads/1/3/0/9/130969097/85223f2c149a1e.pdf
    • http://kleoniki.com/uploads/1/3/0/2/130272898/9340041.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_off0000c9ec.bin
6b4f9d3dc87e864f7dfae27aeb8fdf649a8660f7482108f786634f8603f8f0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 8888 bytes

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