Malicious PDF — malware analysis report

Static analysis result for SHA-256 be51671d9d85c9f5…

MALICIOUS

PDF

36.2 KB Created: 2020-04-11 02:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b4a5100852eb1a2f43b708e492e0a99f SHA-1: 4ad9b2be28909817fdcc58fa495c4d7aa46ded16 SHA-256: be51671d9d85c9f524e1dd658b466b9e0df112edac572ed7ea05caec1b0eb59b
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation. One prominent link, 'http://beingself-centered.com/uploads/1/3/0/7/130775676/130775676.html#symantec+endpoint+protection+removal+tool+windows+10', is presented as a search result for a security tool, likely a lure to trick users into downloading malicious content or visiting a phishing site. The ML classifier strongly supports the malicious nature of this PDF.

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://beingself-centered.com/uploads/1/3/0/7/130775676/130775676.html#symantec+endpoint+protection+removal+tool+windows+10
    • http://eclectic-kids.com/uploads/1/3/0/5/130589310/paronesexegasopive.pdf
    • http://belleandbeaucompany.com/uploads/1/3/0/6/130620618/nuxoxu.pdf
    • http://bronmarycane.com/uploads/1/3/0/2/130270997/rududitenegu_pedojabuw_kewuzo_jikoja.pdf
    • http://brightzone.net/uploads/1/3/0/6/130639877/novajobinuk.pdf
    • http://ambidfilms.com/uploads/1/3/0/4/130483748/kagavubi-zivipo.pdf
    • http://setterpointer.hu/uploads/1/3/0/5/130551090/notivenorigigidopab.pdf
    • http://justfortonight.org/uploads/1/3/0/6/130620657/daralomugukuxet_pagetufexozit_tulisaba_koxononamapin.pdf
    • http://schickbrasil.com/uploads/1/3/0/9/130969496/larav.pdf
    • http://do4dc.com/uploads/1/3/1/4/131454057/mufawapixiwasid_diwuzufupojupuw.pdf
    • http://soulmindbody.eu/uploads/1/3/0/6/130604231/7dc546ed9fcc.pdf
    • http://earthlyreader.com/uploads/1/3/1/4/131408899/pirojaju.pdf
    • http://proelectronicsolutions.com/uploads/1/3/1/4/131437376/f947fea0e01fd.pdf
    • http://firststreetgaragedogs.com/uploads/1/3/0/8/130874672/e5ca09a.pdf
    • http://earthlyreader.com/uploads/1/3/1/4
    • 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_off00006434.bin
fd6f43320a12840e1653435f63722add7399404d71a0a34668efdddc262b7e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 8216 bytes

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