Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3393231b033a061…

MALICIOUS

PDF

38.8 KB Created: 2020-03-16 20:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c7a81b77459ff98b5809813eff6252e3 SHA-1: 9eb78161466d48a73132498aa572cad953838188 SHA-256: e3393231b033a061fbfb560e030cd135d1cf739e77601b0dc30f5700eea698bf
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The heuristic 'PDF_SEO_LINK_FARM' indicates this is a link farm designed to manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be directing users to a network of websites, likely for SEO manipulation or to host further malicious content.

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://yaredimmtratax.com/uploads/1/3/0/5/130551011/130551011.html#como+citar+una+tesis+en+formato+apa
    • http://www.edutainmint.com/uploads/1/3/0/7/130739247/5608104.pdf
    • http://nutritionwithyvonne.com/uploads/1/3/0/5/130588157/8977474.pdf
    • http://warrenbsmith.org/uploads/1/3/0/4/130476308/remitim_kilimun.pdf
    • http://r-ain.com/uploads/1/3/0/6/130639642/kagutisitowo-kejapaxuka-dakumitonewix.pdf
    • http://somethingblueresale.com/uploads/1/3/0/2/130291555/1d8fb001.pdf
    • http://thechrischapman.com/uploads/1/3/0/5/130543107/7856598.pdf
    • http://notonmeth.com/uploads/1/3/0/6/130604459/taranasikogez_zedafowaguzim_tujijos_javixup.pdf
    • http://getfantasticweed.com/uploads/1/3/0/5/130588591/povezujo_janafowogi.pdf
    • http://dickenscarolersgr.com/uploads/1/3/0/9/130969042/labefemajumoguz.pdf
    • http://www.billykellyportfolio.com/uploads/1/3/0/5/130589360/bogujatunifuk.pdf
    • http://rosanelrealty.com/uploads/1/3/0/6/130639409/nowomoj_gukikiwisit.pdf
    • http://phroztnet.net/uploads/1/3/0/8/130814076/176168f54c1d5c.pdf
    • http://roccostransmission.com/uploads/1/3/0/2/130273578/7278472.pdf
    • http://devotionswithdennis.com/uploads/1/3/0/6/130640049/b524a71d351.pdf
    • http://outreachsor.com/uploads/1/3/0/2/130274315/0cb425ec3.pdf
    • http://www.easytrack.nz/uploads/1/3/0/6/130603997/2a6aa.pdf
    • http://escapeforheiresses.com/uploads/1/3/0/4/130490561/samuxitewemore.pdf
    • http://cklicke.com/uploads/1/3/0/5/130551083/8863429.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_off00006ce5.bin
a13e7c1adf475b2ed7dbe425bb3b45259412c73833d997ce8e9388991779831b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE5 8576 bytes

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