Malicious PDF — malware analysis report

Static analysis result for SHA-256 8165af7502980d0b…

MALICIOUS

PDF

35.9 KB Created: 2020-03-15 07:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a3d85dedf88c5bd5a33d5b9d2cdfa671 SHA-1: af6d0dd7975a103926b79285d2472309aaca73b1 SHA-256: 8165af7502980d0bf1f7ac83ba25e23d5c54c003d0c2a841abfb8d6d5ea7389c
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farming technique. No scripts were extracted, and the document body content is largely unreadable, making it difficult to determine a more specific attack pattern beyond link distribution.

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://katiaponomareva.com/uploads/1/3/0/7/130739614/130739614.html#tamil+christian+songs+ringtones+mobile+free
    • http://cocosartisanscollective.org/uploads/1/3/0/7/130775786/merubo-xiwonexatowe-rosezawi-xolamedewuko.pdf
    • http://mta-sts.mx0.crossfithh.de/uploads/1/3/0/5/130588445/modugat_jesuxewepis.pdf
    • http://stanfordinnanaheim.devsite-1.com/uploads/1/3/0/3/130379347/58d962d68.pdf
    • http://vascularclinic.com/uploads/1/3/0/6/130605510/jusokaw-xotajilodorona.pdf
    • http://dojofernandoalonso.nl/uploads/1/3/0/6/130621880/6350828.pdf
    • http://designsacredgarden.com/uploads/1/3/0/4/130475879/suros-xukozojufo.pdf
    • http://rivercityenv.com/uploads/1/3/1/1/131163752/51cffb17.pdf
    • http://mquest.space/uploads/1/3/0/3/130323674/valuzapeteguzu.pdf
    • http://customerfocusedlearning.com/uploads/1/3/0/6/130604201/karevobufukokaxazeko.pdf
    • http://singletonstriders.com/uploads/1/3/0/8/130813458/zazifojafilekaj.pdf
    • http://www.talkinshops.com/uploads/1/3/0/4/130488736/8460674.pdf
    • http://akihiroyasui.com/uploads/1/3/0/5/130589007/7705854.pdf
    • http://hearingaidsbycarol.com/uploads/1/3/0/9/130969004/b3359a1bce15.pdf
    • http://host101.carmichaelnl.com/uploads/1/3/1/0/131070718/45ef61787f18.pdf
    • http://airporthoppermaynooth.com/uploads/1/3/0/6/130620957/giwuzezekaseka.pdf
    • http://leepehgee.com/uploads/1/3/0/5/130590355/5835764.pdf
    • http://www.thebodycureoffers.net/uploads/1/3/0/4/130436197/8846821.pdf
    • http://randomminds.net/uploads/1/3/0/7/130738680/7348911.pdf
    • http://andykoting.com/uploads/1/3/0/2/130270971/zusewagukobafeg.pdf
    • http://nickkessler.net/uploads/1/3/0/6/130604498/4e58d1fc1b83.pdf
    • http://www.alienbooksprague.com/uploads/1/3/0/4/130478709/9cc86dc5564b6b1.pdf
    • http://webnock.info/uploads/1/3/0/2/130291786/fdefd7e4d07bda7.pdf
    • http://wakmfgi.sites.logojoy.com/uploads/1/3/0/5/130544447/fobelemiz.pdf
    • http://imminentchaos.com/uploads/1/3/0/6/130621965/2086709.pdf
    • http://drbabino.org/uploads/1/3/0/5/130543035/fuvajawozuwug_biwawejezo_fajegolitotepe.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_off000065d6.bin
3f8616258266c0e68b3ea5647fab9aa4cc0e565d92d30d989e0ab9f91b0be278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D6 6968 bytes

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