Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e4eb021a83ff52…

MALICIOUS

PDF

42.0 KB Created: 2020-04-19 02:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be2015b24d00e88103a5799d49f4f130 SHA-1: 72934a57235b7388ce25dc0b5fb81cd0490d06ac SHA-256: 57e4eb021a83ff520ce467087fddf81eb02ebd8abdeaba532fb9c559abf21666
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs supports this assessment. The document body text mentions 'Android app store badge', suggesting a lure to trick users into visiting potentially harmful sites.

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://jenntreado.com/uploads/1/3/0/6/130604358/130604358.html#android+app+store+badge
    • http://girlsjustwannadraw.com/uploads/1/3/0/2/130272477/kalesotusu.pdf
    • http://ultimatefrisbeegloves.com/uploads/1/3/0/9/130968943/6220d01b5ebf.pdf
    • http://kimresine.ca/uploads/1/3/0/7/130776478/1959469.pdf
    • http://conciearth.com/uploads/1/3/0/5/130541221/romirabegu_lupovuz_kazujujo.pdf
    • http://contractor-pm.com/uploads/1/3/0/6/130622110/f3878ede73d2.pdf
    • http://fitzcocapitalinc.com/uploads/1/3/1/3/131383751/3296549.pdf
    • http://advancedprotection.net/uploads/1/3/0/6/130621897/mopivipababebiw-jitob.pdf
    • http://oranair.net/uploads/1/3/0/5/130543874/27a75d52f0c.pdf
    • http://handsofpossibilties.com/uploads/1/3/0/5/130588947/bopufibodudinag.pdf
    • http://cleanyourspace.net/uploads/1/3/0/6/130621390/714407.pdf
    • http://norikiyohonda.com/uploads/1/3/0/8/130814784/lufavakemi-pusotiwuvebex-wuves.pdf
    • http://jcitheimagemakers.com/uploads/1/3/1/4/131438155/9190b.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_off00007b3a.bin
85a1b6f70a4363e7ca362dcb35fadf9e7625ed2a604145b6147a53e172655999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3A 8688 bytes

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