Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaa79549137f9f7…

MALICIOUS

PDF

42.9 KB Created: 2020-03-08 09:38:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a747fb6dcd63bb43c4e6f4243ca01e37 SHA-1: 5645ea93eb03fedf7f65fd98e25c77f173aca25b SHA-256: 0eaa79549137f9f73d0832065e8c7a587c708b997ffbc20a1dbec54102235a04
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous PDF link farm heuristics supports this. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of links, potentially leading to further compromise.

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://axis79.pleasingfood.com/uploads/1/3/0/8/130874031/130874031.html#printable+list+of+alkaline+and+acidic+foods
    • http://newcenturyplayers.com/uploads/1/3/0/3/130324152/5634051.pdf
    • http://www.ddlorenzobooks.com/uploads/1/3/0/8/130874127/9043947.pdf
    • http://www.mycyberphile.com/uploads/1/3/0/7/130776585/rosuxakiwelo-mewadosogeku-ruwikar.pdf
    • http://www.btbboutique.net/uploads/1/3/0/3/130323597/6780da06b96fdc.pdf
    • http://www.oraclereadings.com/uploads/1/3/0/5/130589360/02556f2c4479c13.pdf
    • http://prayersummitindia.org/uploads/1/3/0/7/130776590/5225237.pdf
    • http://electmusic.net/uploads/1/3/0/3/130379435/14dcbc.pdf
    • http://www.iamdaniellestevens.com/uploads/1/3/0/2/130272387/9fa17ad0.pdf
    • http://airstreaml2004jl.com/uploads/1/3/0/6/130621892/gorezepex_zefafurukured_zuligusut.pdf
    • http://mikealfieri.net/uploads/1/3/0/5/130550712/cbe20637.pdf
    • http://truthaboutbellinghambaptistchurch.com/uploads/1/3/0/5/130588775/9932600.pdf
    • http://server12319.ice-spot.com/uploads/1/3/0/5/130589297/8813262.pdf
    • http://www.diana888.com/uploads/1/3/0/2/130272853/vadete-bakati-xodopituz.pdf
    • http://emilykasra.com/uploads/1/3/0/4/130489776/wakusine-jitepajikake-kiripijep.pdf
    • http://cpanel.greyandbird.com/uploads/1/3/0/5/130589158/gedod.pdf
    • http://doreandmi.com/uploads/1/3/0/2/130271031/xamepeneg.pdf
    • http://revealyoga.org/uploads/1/3/0/5/130588675/7146864.pdf
    • http://desertfever.com/uploads/1/3/0/4/130489055/romoni.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_off00007ef5.bin
bb6b1239732e180f80fa61f7a6b25f1c1a014a901193e258c02ac1caf629a087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF5 8116 bytes

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