Malicious PDF — malware analysis report

Static analysis result for SHA-256 464819ab432b4f93…

MALICIOUS

PDF

41.7 KB Created: 2020-03-11 02:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c430531fec41a85c07100635f63e2fac SHA-1: 592e34d7e6534aa7e69a7d222f4447468c21fbf0 SHA-256: 464819ab432b4f934a4b86ed6de5850b5a09e9d51d40338aff922c7993c022e2
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to files with numeric or generic slugs, indicative of a link farm or SEO spamming technique. The document body, though partially corrupted, contains a lure related to 'spoken english through telugu books free download pdf' and includes URLs that likely lead to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://webmail.storgebhs.com/uploads/1/3/1/0/131069923/131069923.html#spoken+english+through+telugu+books+free+download+pdf
    • http://raphel.com/uploads/1/3/0/5/130550930/68590f7d.pdf
    • http://www.mattclinesfitness.com/uploads/1/3/0/8/130814460/91511.pdf
    • http://erinkchapin.com/uploads/1/3/0/2/130289809/nativares-zinosox-rovomove.pdf
    • http://mobilecardetailingphx.com/uploads/1/3/0/3/130313070/1889839.pdf
    • http://aikenkraft.com/uploads/1/3/0/7/130739188/bb1c2.pdf
    • http://mail.enchantingxsd.com/uploads/1/3/0/6/130639116/8af04304.pdf
    • http://cpanel.sparklesandspitballs.com/uploads/1/3/0/9/130968988/7ef16da.pdf
    • http://myvisl.us/uploads/1/3/0/4/130476309/josaruk_negikoda_sanuvosixese_ruxobuvidapunob.pdf
    • http://www.jeremyengelart.com/uploads/1/3/0/4/130489367/36e058b2dec7b.pdf
    • http://antens.nl/uploads/1/3/0/5/130540472/6616581.pdf
    • http://mbanerds.net/uploads/1/3/0/4/130479082/besunujiba_jimukolasuzo_kemidap.pdf
    • http://starbritebucket.com/uploads/1/3/0/3/130313249/gotaguxabozusi.pdf
    • http://nastybritches.com/uploads/1/3/0/2/130273788/71642.pdf
    • http://ebbtidewellnessstudio.com/uploads/1/3/0/7/130739718/nefupipa_xuwunitised_zemidit_jafuregazenej.pdf
    • http://www.capitalareaanesthia.com/uploads/1/3/0/5/130588921/wijek-borimuxen-vinikediluwavor-vopepobutug.pdf
    • http://wearefreedomhi.com/uploads/1/3/0/6/130621161/miluserorajinip.pdf
    • http://captraining12.com/uploads/1/3/0/5/130589360/dixorejozarunadufak.pdf
    • http://mta-sts.arieribbens.nl/uploads/1/3/0/8/130814122/jowixozo_gazoxedunipu.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_off00007563.bin
6b51d54f5aa8b621e982762290243b9476f1a5c78e85bbc1d7585e84c3289852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 8792 bytes

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