Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb6b11323ae741c…

MALICIOUS

PDF

30.5 KB Created: 2020-05-14 03:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: baba0c1872f28f2c19f686f857ad30f2 SHA-1: 4d85b0a7ceb03f1ea1547970e38d933bd2a77cac SHA-256: 3cb6b11323ae741c2e035767b3e234f3757ce280548dac1982f935c2c4f06f1b
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDFs hosted on similar domains. This pattern is indicative of a link farm or SEO manipulation tactic, likely intended to drive traffic or distribute further malicious content. The ML classifier strongly flagged this sample as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://tuitionhotsauce.com/uploads/1/3/0/9/130969997/130969997.html#n+s+s+o+ka+full+form
    • http://comicbrickbuilder.com/uploads/1/3/0/4/130488220/3473889.pdf
    • http://prettygirlmua.com/uploads/1/3/0/7/130738841/1219516.pdf
    • http://planetvag.de/uploads/1/3/0/7/130776433/liwebuxizimutoz_rujuw_kaxik.pdf
    • http://massaji.co/uploads/1/3/1/3/131381241/8156098.pdf
    • http://onenicholasryan.com/uploads/1/3/0/5/130551728/1188589.pdf
    • http://colormezen.com/uploads/1/3/1/6/131606844/9b532629d84.pdf
    • http://thegreenapplehealthfoods.net/uploads/1/3/0/5/130540040/sezin.pdf
    • http://unevieclassique.ca/uploads/1/3/0/7/130775244/bonugoluzamuwi-wijalazam-lotijobujenulo-javikinuge.pdf
    • http://petrichment.com/uploads/1/3/0/3/130323522/bokuvimuv.pdf
    • http://oddamericancompany.com/uploads/1/3/1/1/131163858/e68a3.pdf
    • http://stevegodsoe.com/uploads/1/3/0/2/130271219/biseparumufimafipaf.pdf
    • http://adoucisseurs.info/uploads/1/3/0/6/130621296/gamutelofuzoparo.pdf
    • http://crucedeljordan.com/uploads/1/3/0/6/130621608/guzuzutulomed.pdf
    • http://dylanmccarthyblackston.com/uploads/1/3/0/6/130605203/4247478.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_off00004a70.bin
60ba8200b7678da0e80e2804811786c01dc665786751508f23e4285b40e96e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A70 10840 bytes

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