Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcddf9dbf076afa…

MALICIOUS

PDF

42.2 KB Created: 2020-04-11 07:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8b5c829446d506260a048fbcb9ce350a SHA-1: 4717b7f374164dd038a5c175bf7351f635280161 SHA-256: 7dcddf9dbf076afaea6ecb3e5bcab9ccda27fee55522942aff78c0303d8473e2
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to direct users to malicious sites. The document body, though partially corrupted, contains text related to 'Importance of diagnostic test in education pdf' and references wkhtmltopdf, suggesting a lure to disguise the malicious intent. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this is a link farm. No scripts were extracted from this sample.

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://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/4/130436313/130436313.html#importance+of+diagnostic+test+in+education+pdf
    • http://angellashandbeauty.com/uploads/1/3/0/4/130483667/5469800.pdf
    • http://led-chicago.com/uploads/1/3/1/4/131437583/6007726.pdf
    • http://artcrafttheatre.com/uploads/1/3/1/4/131483090/bexaf-xikagulixumega-vixakapewota.pdf
    • http://amarcuragr.com/uploads/1/3/0/2/130272081/7e3c1f601.pdf
    • http://mokenarealestatelawyer.com/uploads/1/3/1/4/131437544/a6a25b95268.pdf
    • http://nnn-investing.com/uploads/1/3/0/5/130541000/1934069.pdf
    • http://conversationcompass.com/uploads/1/3/1/3/131379277/2e18096f6bcf508.pdf
    • http://mccarthyspubfethard.com/uploads/1/3/1/3/131378950/efa7c0c74e.pdf
    • http://muneforconstructionengllc.com/uploads/1/3/0/3/130313253/6702f376.pdf
    • http://satromforhouse.com/uploads/1/3/1/4/131410479/tutekesisole.pdf
    • http://getcbdmerchantaccount.com/uploads/1/3/0/7/130775997/gidudu-sipalukun-bodewage.pdf
    • http://thecolonialtheater.org/uploads/1/3/0/5/130551445/2b6b6146.pdf
    • http://servicedoffice.net/uploads/1/3/1/4/131406879/zilirikevazuvo.pdf
    • http://anniestexasmusings.com/uploads/1/3/1/0/131070125/zafomufinoxezogo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007573.bin
ab7ded30b49f9a4b98ea71dc67432ceaf3a4a4cdc0ac23f97933a00842db1ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7573 7328 bytes
font_01_sfnt_off00009253.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9253 2652 bytes

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