Malicious PDF — malware analysis report

Static analysis result for SHA-256 3085338beaeda4ab…

MALICIOUS

PDF

44.0 KB Created: 2020-04-06 06:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 98d72afdcb0282550de0e59d0c370188 SHA-1: 635a538d2a1343184d0784c9d9256fea1b1b95b0 SHA-256: 3085338beaeda4ab394909f03309e48f4de2e45481404b7c55d7feb5af7968ac
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 appear to be dynamically generated or follow a pattern indicative of a link farm. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is an attempt to manipulate search engine results or direct users to malicious content. The ML classifier also flagged this PDF with high confidence. The primary intent appears to be directing users to a network of external websites, likely for malicious purposes such as phishing or malware distribution.

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://lakewoodelementary.net/uploads/1/3/0/7/130740200/130740200.html#kenmore+elite+he3+dryer+e1+code
    • http://genx-er.com/uploads/1/3/0/5/130550920/pexomogofiro.pdf
    • http://ninthquarterproperties.com/uploads/1/3/0/6/130621506/lufivowid_xapoku_vusema_dirazokawuna.pdf
    • http://echelonaerial.com/uploads/1/3/0/7/130739704/a4ab8bbf8.pdf
    • http://spokanesultimatemodel.com/uploads/1/3/0/2/130287893/5974734.pdf
    • http://ra-metals.com/uploads/1/3/0/2/130287285/3697474.pdf
    • http://woodlandstuition.com/uploads/1/3/0/6/130604110/8b9a3a33d.pdf
    • http://westsideyogatherapy.com/uploads/1/3/1/4/131453561/fabibukevaga_kepidinu_pigurav_gopujogaginob.pdf
    • http://the-lifechurch.org/uploads/1/3/0/5/130539269/1424655.pdf
    • http://ansaluxe.com/uploads/1/3/1/0/131070036/3486191.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_off00008377.bin
9db9fb52449db11fe1eb489dfd78e5b233131fb4330ad16838fdeb2e4ea3e954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 8212 bytes

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