Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82ef061898d138b…

MALICIOUS

PDF

53.0 KB Created: 2020-03-17 02:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 30d457ec83aa496208c1507cdcf713b0 SHA-1: c7b5a7ec1147cfd768efa421fc4730b03891a95e SHA-256: f82ef061898d138b9c964dea1bd6c4bd883e5844ec04cd4f1e58d3527ccd80cf
94 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to other PDF files hosted on various domains, suggesting a link farm or SEO abuse tactic. The document body contains garbled text along with a reference to 'Assassin's creed unity nostradamus enigma' and the wkhtmltopdf application, indicating it may be a lure document. The primary attack pattern involves directing users to a network of potentially malicious or deceptive websites.

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://three-ps-in-a-pod.com/uploads/1/3/0/6/130604986/130604986.html#assassin%27s+creed+unity+nostradamus+enigma
    • http://mta-sts.mx.dfwcaststone.net/uploads/1/3/0/2/130273582/4113500.pdf
    • http://ninaschjeide.net/uploads/1/3/0/3/130323290/liponizuj.pdf
    • http://tarrafaldjuntamo.org/uploads/1/3/0/7/130775841/fiduvik.pdf
    • http://www.reprogramco.com/uploads/1/3/0/4/130476385/moralejikugis_winemefukixegum_zoged.pdf
    • http://rmfavorito.com/uploads/1/3/0/5/130545557/5844565.pdf
    • http://turtlerivertownship.marketingfactorygroup.com/uploads/1/3/0/4/130475996/wepokasa_nevepan.pdf
    • http://completecarpetcare.co/uploads/1/3/0/6/130639071/gabolotolemepap.pdf
    • http://ocseocali.com/uploads/1/3/0/5/130544446/130acc7fe9192.pdf
    • http://criticalpractitioners.com/uploads/1/3/0/6/130604594/gitutitanogami_ferejoxa_besufasu_regajigup.pdf
    • http://pizzapalace.shop/uploads/1/3/0/9/130969129/xewekijogafib.pdf
    • http://alsant.com/uploads/1/3/0/5/130589360/6373045.pdf
    • http://beinspiredworkshop.com/uploads/1/3/0/6/130639534/3145604.pdf
    • http://theswingplane.com/uploads/1/3/0/3/130312964/788ea4.pdf
    • http://www.speakersz.com/uploads/1/3/0/6/130621646/a5e527c96c6.pdf
    • http://webmail.goldrushdispensary.com/uploads/1/3/1/1/131163980/koviliwegolise_tinabepakov_wipir.pdf
    • http://mx.joangraham.com/uploads/1/3/0/5/130588674/moriraxeja-sawoz-maluwitugozuf.pdf
    • http://buildclicks.com/uploads/1/3/0/9/130969140/f0ca8743384e.pdf
    • http://www.gcgg.me/uploads/1/3/0/7/130738876/7a16105.pdf
    • http://koawarriors.com/uploads/1/3/0/3/130323465/6089721.pdf
    • http://8610enterprise.com/uploads/1/3/1/0/131070688/c18a16a6.pdf
    • http://www.un-mariage-a-la-reunion.fr/uploads/1/3/0/2/130270901/2a875604c8729.pdf
    • http://reachfullpotential.org/uploads/1/3/0/8/130814782/849abdb.pdf
    • http://alleylouisville.com/uploads/1/3/0/3/130323268/8e37c7a7c73.pdf
    • http://www.sacredcreationsdaycare.com/uploads/1/3/0/5/130589313/faxipilatugasuz.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_off0000a61c.bin
cbc1d3de7bd8a3221800be9b8fce7e19cd1252ed1fefa9071fad05a5d00ae701		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA61C 8404 bytes

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