Malicious PDF — malware analysis report

Static analysis result for SHA-256 a868bea64aa2bd30…

MALICIOUS

PDF

35.5 KB Created: 2020-06-04 13:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eeda253a7d819731cd207472088f083 SHA-1: 44f947974633720fbeaaee5ae0b9d291f228067c SHA-256: a868bea64aa2bd30880a1f74725a8e6136aaa45fdce5abb68ef4ff48db96e7b2
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, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The document body text, though partially corrupted, mentions 'Strong body guide free download', suggesting a lure to entice users to click on the embedded links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://cpanel.digcitinstitute.com/uploads/1/3/1/4/131407316/131407316.html#strong+body+guide+free+download
    • http://indranilchatterjee.com/uploads/1/3/0/2/130272250/domaxokef.pdf
    • http://themouseauthority.com/uploads/1/3/0/7/130775087/jibij_gulafuzutizimas.pdf
    • http://oldmantakealookatyourlife.com/uploads/1/3/1/8/131857056/xuwozeleputuwi.pdf
    • http://accentlifeacademy.com/uploads/1/3/1/6/131636886/nilakunavaseg.pdf
    • http://powervtraining.com/uploads/1/3/1/4/131453521/7739103.pdf
    • http://mta-sts.mail.videouk.com/uploads/1/3/0/2/130287991/kamuvomedonogij-dabazimitasup-lotiridubuto-kuretuzawi.pdf
    • http://mail.shopfiorina.com/uploads/1/3/0/2/130288486/bixasi_biwubutarim_wisikisixewuve_rawexe.pdf
    • http://milesstern.com/uploads/1/3/1/8/131871414/fesarutinetopozod.pdf
    • http://cpanel.digcitinstitute.com/uploads/1/3/1/4/131407316/terms.html
    • http://cpanel.digcitinstitute.com/uploads/1/3/1/4/131407316/dmca.html
    • http://cpanel.digcitinstitute.com/uploads/1/3/1/4/131407316/policy.html
    • http://cpanel.digcitinstitute.com/uploads/1/3/1/4/131407316/terms
    • https://momuniwidap.files.wordpress.com/2020/06/4066933178.pdf
    • https://pegivemabi.files.wordpress.com/2020/06/37514650821.pdf
    • https://rigadiwototu.files.wordpress.com/2020/06/79567056794.pdf
    • https://nepigipoduge.files.wordpress.com/2020/06/zarusuruwuj.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_off00005ff9.bin
92f370a60e9bfd10293d9787130d2facc14b0f04915ece87989deabe300b03da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 9972 bytes

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