Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60f1e80f652f239…

MALICIOUS

PDF

53.3 KB Created: 2020-04-12 20:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b96a9063177c723be0fff1900be7b150 SHA-1: 478e13a171bd89316db9311405b386d9932eae05 SHA-256: d60f1e80f652f2393926fd4dfc46beb66bed4a534bed4a2cf50592f5e0a55bac
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs suggest a phishing or content-distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cleanguys.co/uploads/1/3/0/6/130640046/130640046.html#ecuacion+para+calcular+la+entalpia+de+una+reaccion
    • http://contemporarypossibilitiesjolie.com/uploads/1/3/0/4/130494801/pubisawu.pdf
    • http://thefellowmanlegacy.org/uploads/1/3/1/4/131437785/regup_xoteravimedo_pekenuguzor.pdf
    • http://karithierer.com/uploads/1/3/0/3/130313089/dizuzubip.pdf
    • http://jordanschuman.com/uploads/1/3/0/5/130588735/5064842.pdf
    • http://healthangelcoach.com/uploads/1/3/1/3/131379696/219794.pdf
    • http://cannabisnursepartners.com/uploads/1/3/0/6/130620778/7555812.pdf
    • http://cardifftrailertransport.com/uploads/1/3/0/4/130488699/lilevirakimugab_kulofenejone_zoropibaguvixaz_kareto.pdf
    • http://hydeparklocal.com/uploads/1/3/1/4/131453252/zovakitapa_tekizag_tugezebor.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077fe.bin
992667195c8f2d05e7b487a4ab98432b111bc4a01a31c25faadde99d6b03cc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FE 9468 bytes
font_01_sfnt_off00009a7d.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7D 2652 bytes
font_02_sfnt_off0000a3bb.bin
92960e0e807263a12bad55ec69bafb6714c32758af60e957fa6a07630d5d1445		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BB 4156 bytes
font_03_sfnt_off0000b0d3.bin
a003c762be7583e1de981626f27d9201294a6d2a78716fcf79194663cb828d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D3 16152 bytes

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