Malicious PDF — malware analysis report

Static analysis result for SHA-256 59532ec029fd7e92…

MALICIOUS

PDF

36.5 KB Created: 2020-03-30 08:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 41473e66ebc279a9127821f6ae3b29ab SHA-1: e372ec77714492640f24392a2eae05cf7c9708ba SHA-256: 59532ec029fd7e92c3cc5db4a1f95154f1e5ba5a834065e97359f701dacd1078
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to host malicious content. The document body suggests a lure for a 'Linux study guide pdf download', which is likely a pretext to drive users to download further malicious PDFs from the numerous linked domains. The primary attack pattern involves a link farm designed to distribute potentially harmful files.

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://seastar.websalve.com/uploads/1/3/0/6/130620773/130620773.html#linux++study+guide+pdf+download
    • http://divinegrace101.com/uploads/1/3/0/4/130435661/xasilizepise_letawakegasal.pdf
    • http://ns.stephaneheaume.com/uploads/1/3/0/6/130639350/pimavin.pdf
    • http://pilgrimagesnepal.com/uploads/1/3/0/9/130969904/924343.pdf
    • http://robosail.org/uploads/1/3/0/7/130775294/a10b06ec.pdf
    • http://giftsandcraftsbyzara.com/uploads/1/3/0/4/130476784/1594056.pdf
    • http://www.timelessfaces.com.au/uploads/1/3/0/9/130968911/nuvej.pdf
    • http://slhomestead.com/uploads/1/3/0/4/130483136/89ff5ab9dcff.pdf
    • http://myfujingarts.com/uploads/1/3/0/5/130551309/sobexidatab.pdf
    • http://friendsofmaurinefbailey.org/uploads/1/3/0/7/130739061/najabuwoseni-povewut.pdf
    • http://dayscreekschools.com/uploads/1/3/1/0/131071157/xikedagimaniw.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_off000063ff.bin
9e959a2b69581336debbb4eb819ab39779f700ca29684263960212264bfe69b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 8260 bytes

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