Malicious PDF — malware analysis report

Static analysis result for SHA-256 67aea68d2e91db53…

MALICIOUS

PDF

59.6 KB Created: 2020-04-03 06:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e61a86568c144cd1e17a6eb43cb4601e SHA-1: c37da4857ded3d10e05901aefb6af447b825581d SHA-256: 67aea68d2e91db53ffcb1b48a0758aabe8760d2751aa4e83641480e3ac911c21
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. While no scripts were directly extracted, the PDF structure and extensive link farm indicate a probable attempt to distribute malware or engage in phishing activities.

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://geldverdienenmetcoins.com/uploads/1/3/0/8/130813417/130813417.html#what+is+energy+in+power+plant+produce
    • http://belgianprocessminingresearchday.org/uploads/1/3/0/5/130589397/wuvunavub.pdf
    • http://varietyblindsandshutters.com/uploads/1/3/0/7/130775539/nemasirevido_potepowolidiv_xotonakegepub_vumig.pdf
    • http://aotsubaki.net/uploads/1/3/0/6/130621278/bisaka.pdf
    • http://ginettewhite.com/uploads/1/3/0/4/130435547/2007662.pdf
    • http://infinitespin.com/uploads/1/3/0/7/130739287/2289437.pdf
    • http://thereadycareclinic.com/uploads/1/3/0/4/130436058/rorano.pdf
    • http://kashkoshltd.com/uploads/1/3/0/7/130740489/03bcecb4352a49e.pdf
    • http://jahielworkshops.com/uploads/1/3/0/6/130605504/8b18581cd.pdf
    • http://gatostf.org/uploads/1/3/0/5/130588625/1468318.pdf
    • http://onlineflouz.com/uploads/1/3/0/4/130488157/movemufikebu.pdf
    • http://superiortherapyconnections.com/uploads/1/3/1/4/131453521/samog.pdf
    • http://wavesca.com/uploads/1/3/0/6/130640095/a74bdcbb082f8.pdf
    • http://shaktifestival.com/uploads/1/3/0/5/130550879/murimufopobog.pdf
    • http://ltang.people.ua.edu/uploads/1/3/1/3/131379035/batiduxawebi-nepozimezuvemip.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_off0000bf4f.bin
f326e73099745a25f3f2013e0bd01c2d96d93e17f6f4b105037c173fdfd2a765		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4F 9012 bytes

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