Malicious PDF — malware analysis report

Static analysis result for SHA-256 f774f8cda67ac024…

MALICIOUS

PDF

36.1 KB Created: 2020-03-28 08:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b16a6890e6b01dbc6bd416ab3d9238b4 SHA-1: 72c5383a8eabd5b5c5522e1b17313f5a53072c01 SHA-256: f774f8cda67ac0245358afd91600fe62d661b933b68f96351b74c8dd446b5843
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on 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 suspicious nature of the embedded URLs. No scripts were extracted, and the document body is heavily obfuscated, but the sheer volume of external links points to a coordinated effort to direct users to potentially harmful content.

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://kohno-corp.com/uploads/1/3/0/2/130272936/130272936.html#sin%C3%B3nimo+aspecto+f%C3%ADsico
    • http://smilecntr.com/uploads/1/3/0/6/130605438/jaxofa_leditexaj_nufus.pdf
    • http://nurahlusunnah.com/uploads/1/3/0/6/130620626/9df4c111ec434b.pdf
    • http://fantasynfun.live/uploads/1/3/0/5/130550925/mifelunoxa_bixefoxikesob.pdf
    • http://mayawalsh.com/uploads/1/3/0/4/130435998/f58393bc6.pdf
    • http://jaredlindsey.com/uploads/1/3/0/5/130589033/3298477.pdf
    • http://www.hugglesandhideaways.co.uk/uploads/1/3/0/8/130874120/2875520.pdf
    • http://noeliacustomcreations.net/uploads/1/3/0/6/130639524/1903040.pdf
    • http://www.telluridemushroomfest.org/uploads/1/3/0/4/130488688/2756982.pdf
    • http://4streets.org/uploads/1/3/0/7/130774982/7335690.pdf
    • http://oyot.ca/uploads/1/3/0/7/130775622/wazizo_folerujudiw_xalatavolor_mitorosutalop.pdf
    • http://labconptyltd.com/uploads/1/3/0/6/130605335/gogunas_vabumibinawu_xuveturipatavi.pdf
    • http://the-eco-nest.com/uploads/1/3/0/3/130379488/15724c99.pdf
    • http://iamsoundandvideo.net/uploads/1/3/0/5/130539818/8a7daa2bfb0f.pdf
    • http://andreaschwartzitcc.com/uploads/1/3/0/7/130776208/7804133.pdf
    • http://webmail.kingscrownorganics.com/uploads/1/3/0/2/130287261/pibanijugeb.pdf
    • http://monumnentalbeginnings.com/uploads/1/3/0/2/130289282/ffa0e0b822a036.pdf
    • http://vintagevancouvan.com/uploads/1/3/0/5/130590026/6909996.pdf
    • http://lisacurt.com/uploads/1/3/0/8/130874043/zanaju.pdf
    • http://www.kristenlavigne.com/uploads/1/3/0/3/130379412/bopitex.pdf
    • http://scoutvids.com/uploads/1/3/0/6/130620436/nomasatedo.pdf
    • http://ownmurrieta.com/uploads/1/3/0/4/130477201/sipoxawu-zijojarebakugo-lilot.pdf
    • http://eventsnewmexico.com/uploads/1/3/0/8/130873958/a73c3.pdf
    • http://sos-1.com/uploads/1/3/0/4/130476372/d12f5ba.pdf
    • http://pradomanagement.com/uploads/1/3/0/7/130776646/47563b434bb8.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_off000062eb.bin
8bd2dcab2e305e6bcd15d5e46a4bb1769ce91893a82cf436085d189c4b14b52c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 8912 bytes

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