Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a4f1e12de93e49…

MALICIOUS

PDF

78.4 KB Created: 2020-03-22 05:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1f188335c7640f49828ff35e29b1b2c SHA-1: ffb207b1856ee6a192a9ed19fa59e37b29eb328c SHA-256: 92a4f1e12de93e49ca7ae67a95806dccbaf23612eb6d36c39d96a960cdde2b58
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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://vitalitybysergio.info/uploads/1/3/0/2/130272474/130272474.html#tri+tronics+sport+basic+g3+manual
    • http://morganschaeffer.com/uploads/1/3/0/7/130776854/56b32d75b0de50.pdf
    • http://www.lilmissrealtor.com/uploads/1/3/0/7/130776760/lodavusovevipudemimo.pdf
    • http://nestgiftsdecor.com/uploads/1/3/0/6/130621700/vafuxadabof.pdf
    • http://rekwiredcosmeticsllc.com/uploads/1/3/0/7/130776211/vimono_loxumok_rovuxomunub.pdf
    • http://caviarcloset.com/uploads/1/3/0/7/130739183/popezolorare_lopilivepuzod_gibarekum_tedujukubufoxov.pdf
    • http://scholalatina.org/uploads/1/3/0/3/130379610/443b70dff2df62d.pdf
    • http://allentertainmentuk.com/uploads/1/3/0/7/130738796/9765084.pdf
    • http://awakeningthedivinewithin.com/uploads/1/3/0/4/130489351/kemasasetedaxiz.pdf
    • http://matras.express/uploads/1/3/0/7/130739493/9680768.pdf
    • http://nitro-networks.net/uploads/1/3/0/8/130814643/5f7778b.pdf
    • http://hostmaster.kathrynrennie.co.uk/uploads/1/3/0/2/130271017/1969103.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_off00010a26.bin
38a1c864a50ca068f2f6e547d2073bda12b57da19c2d6f8c77bf1458d7daabc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A26 9156 bytes

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