Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e080e8596e8d6ae…

MALICIOUS

PDF

38.7 KB Created: 2020-03-22 03:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7c4c255e305ef52a2fdc1a24a1e4c2d SHA-1: ab9bf6db6e0ae259ad816cd1c26203561c8f8f9b SHA-256: 4e080e8596e8d6aeb232b17acd1a9f4c82e376c6fa584443089baadb9413d577
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, a technique commonly used for SEO poisoning or traffic redirection. The ML classifier strongly indicated maliciousness. The embedded URLs and the PDF link farm heuristic suggest a campaign to drive traffic to potentially malicious content.

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://colorindofestas.com/uploads/1/3/0/5/130539597/130539597.html#las+medidas+de+una+ficha+hemerografica
    • http://sanibelcondovacations.com/uploads/1/3/0/4/130483801/metogek.pdf
    • http://www.weigaonano.com/uploads/1/3/0/6/130639854/zamomuj.pdf
    • http://myadorediamonds.com/uploads/1/3/0/2/130288419/c869195ad79a.pdf
    • http://silverrivercoaching.com/uploads/1/3/1/1/131163695/xavirenudoj-tiresobudog-miwowijaziru.pdf
    • http://straighterpath.com/uploads/1/3/0/4/130476447/2029624.pdf
    • http://bowdentech.net/uploads/1/3/0/5/130539465/5280603.pdf
    • http://besttowingfresno.com/uploads/1/3/0/2/130289496/132908.pdf
    • http://www.timothyjcox.com/uploads/1/3/0/5/130551067/vuwapasux-kikenagijutuwo-tonapom-jilajan.pdf
    • http://stgeorgestucco.com/uploads/1/3/0/6/130621127/9260a3aaf.pdf
    • http://www.accompagnementpnl.com/uploads/1/3/0/7/130776420/bivilovarigogexuxi.pdf
    • http://one-breath-at-a-time.org/uploads/1/3/0/8/130814601/0b56123fb843.pdf
    • http://rai-robertsonathleticinstruction.com/uploads/1/3/0/4/130436152/bafadevemutik_dijiz.pdf
    • http://ckclothingonline.com/uploads/1/3/0/5/130590541/5839883.pdf
    • http://premiertravelerus.com/uploads/1/3/0/6/130604878/95c4d88de.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_off00006a4b.bin
48f753af7265597be07e8e90894f53cf4632d62097ec026936aaec5f6a27ffd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4B 9188 bytes

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