Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d7de9be4405d39…

MALICIOUS

PDF

41.2 KB Created: 2020-03-29 01:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a81600baf0b5715909cfc6c3ef82f4c6 SHA-1: 4aaedd5f618f5fdc92f9a9f3ce32398914d07995 SHA-256: 82d7de9be4405d397f6085b145fc40ec24c81c3236e894439c03361abf679268
92 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, many of which are hosted on domains that appear to be part of a link farm. The document body, though partially obfuscated, contains references to a 'Pioneer sx 626 manual' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-like links indicates a probable attempt to distribute malware or conduct phishing by directing users to compromised or malicious websites.

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://74-123-77-252.mgwnet.com/uploads/1/3/1/3/131380299/131380299.html#pioneer+sx+626+manual
    • http://body-better.com/uploads/1/3/0/7/130774993/2229053.pdf
    • http://www.smiledefenders.net/uploads/1/3/0/2/130272859/2679175.pdf
    • http://cincinnatidesignstudio.com/uploads/1/3/0/6/130639517/vemapo.pdf
    • http://chrisusey.com/uploads/1/3/0/5/130550931/merevifafipuw_ridejunogopuzel_dinonutigexaf_tugipaxa.pdf
    • http://derekbrowell.com/uploads/1/3/0/5/130545087/xakomidus.pdf
    • http://triplex-arrow.com/uploads/1/3/0/5/130547418/sogezumutedazufi.pdf
    • http://samwisemagic.com/uploads/1/3/0/6/130620684/gaxafi_xevogokatoniwex_vidat.pdf
    • http://makeovermondaynj.com/uploads/1/3/0/4/130489162/nejilabe_tuwafi_pobukanemazaveg_vedeli.pdf
    • http://sandyhookmachineshop.net/uploads/1/3/0/4/130488308/wuwagefipuwid.pdf
    • http://www.dbsvadvogados.com/uploads/1/3/0/7/130775751/3b305dd25585.pdf
    • http://www.thejourneystudio.net/uploads/1/3/0/2/130289327/jinepun.pdf
    • http://chewysuz.com/uploads/1/3/0/6/130603997/kojina.pdf
    • http://madtrucker.net/uploads/1/3/1/4/131408131/zefikoriropora-sawatidikujanum-dazoxiparos-zavan.pdf
    • http://www.europeansoccerschool.com.au/uploads/1/3/0/7/130775653/1705129.pdf
    • http://nfloo.com/uploads/1/3/0/8/130874220/telafafofuv.pdf
    • http://stellaholland.com/uploads/1/3/0/2/130270937/lipixapuwipubofow.pdf
    • http://mattwood.nyc/uploads/1/3/0/2/130272281/73cf7b7af.pdf
    • http://southernbellefoodtruck.com/uploads/1/3/0/4/130488786/dejewerox.pdf
    • http://furtreenewfoundlands.com/uploads/1/3/0/4/130435777/xegofogavikapok.pdf
    • http://funfithealwellcom.com/uploads/1/3/0/7/130776873/rewabuxixo-jubanunonezaju-suroribikizuk-dididibur.pdf
    • http://www.townsvillewomen.com/uploads/1/3/0/4/130483219/depegeferosi.pdf
    • http://worthaminsurancebenefits.com/uploads/1/3/0/4/130436261/ccdac2ab2d8ad.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_off00006d36.bin
b9912265f724e5b8a765e56ee716ae652b5e5abdc4f7b304e716071e9f9f78cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 8368 bytes
font_01_sfnt_off00008cbb.bin
d8435aac11388b8214bfc980e857510ef47481ba706565f25bd6cae8efb01319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 2828 bytes

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