Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9ff45bed178d46…

MALICIOUS

PDF

41.3 KB Created: 2020-03-27 02:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e5e62eb128e4d4a63cf684d01d333a12 SHA-1: 1ad0d9ace73a22fbfba41f094f77f27fd80ba770 SHA-256: de9ff45bed178d4635874d87fde198f2027f4c4c9541935dc95aab6916a11716
96 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 numerically or generically named, suggesting a link farm for SEO manipulation or to host malicious content. The document body text, though partially obfuscated, mentions 'Capitan de meseros bolsa de trabajo' (Head waiter job offer), indicating a lure to entice users to click on the embedded links. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links reinforces this assessment.

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://sensitiveminds.org/uploads/1/3/0/4/130483443/130483443.html#capitan+de+meseros+bolsa+de+trabajo
    • http://glean-consulting.com/uploads/1/3/0/6/130621628/5012914.pdf
    • http://james-gleave.com/uploads/1/3/0/4/130478882/xibitewamujuwapoju.pdf
    • http://jennarubinfit.com/uploads/1/3/0/3/130313063/9608204cc9f.pdf
    • http://limousinproperty.com/uploads/1/3/0/6/130640229/nuraxutefi.pdf
    • http://www.c4u2.org/uploads/1/3/0/6/130620767/jimabo-vulupojufakewog-xikik-jugekabuxikixol.pdf
    • http://nessasgoodiesshop.com/uploads/1/3/0/6/130603889/penebalaj-tunabezigow.pdf
    • http://thisbodyisnetworked.com/uploads/1/3/0/9/130969845/gunogi_kezow_timoruzigu.pdf
    • http://jxkmanagement.com/uploads/1/3/0/7/130739362/mitiwikupuvusikuno.pdf
    • http://www.chialreservebelize.com/uploads/1/3/0/6/130605122/e3d8f2dcd9c8.pdf
    • http://storyspinner.net/uploads/1/3/0/6/130604422/e85cfd23952.pdf
    • http://hostmaster.roundthesound.com/uploads/1/3/0/7/130740010/pimof.pdf
    • http://www.catholicclassicalschools.org/uploads/1/3/0/3/130323211/4359717.pdf
    • http://porttownpros.com/uploads/1/3/0/4/130477201/8107271.pdf
    • http://autodiscover.bbshopdesigns.com/uploads/1/3/0/3/130323409/2374809.pdf
    • http://milleranneli.com/uploads/1/3/0/7/130775821/lidebamosuzax.pdf
    • http://southeasternenvironmental.net/uploads/1/3/0/6/130605376/nezodozupupot.pdf
    • http://www.weehours.com.au/uploads/1/3/0/8/130873730/mofulogeziwakor-lemugusosedelib-guden-lexevewevisox.pdf
    • http://thulathia.co/uploads/1/3/0/4/130488615/povufexe.pdf
    • http://molivery.ee/uploads/1/3/1/1/131164021/poxidobijezud_budumuvup.pdf
    • http://www.hawkmoto.co.uk/uploads/1/3/0/8/130814584/7910217.pdf
    • http://nw7.me/uploads/1/3/0/3/130379803/gunepozerapidupo.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_off000074bf.bin
55fb14162c26748713ea93c8cba317f2a27ef13baf050bdb211679275802350a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BF 9216 bytes

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