Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4b136be2e60670…

MALICIOUS

PDF

41.2 KB Created: 2020-04-02 05:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a97ed371a7ae9b5f4670dcc9a827b148 SHA-1: da286e9df12d5bc71189db6f9512c8deaefee8f1 SHA-256: cd4b136be2e60670d403368e2ccc0858e74daa45b567de92af9b7c6932c2158a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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 or SEO spam tactic. The document body, though partially corrupted, contains text related to classical and operant conditioning in education, likely a lure to disguise the malicious intent. The primary URL, http://eazi-car-payments.com/..., also points towards a deceptive purpose. The ML classifier strongly flagged this PDF as malicious.

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://eazi-car-payments.com/uploads/1/3/0/9/130969389/130969389.html#condicionamiento+clasico+y+operante+en+la+educacion
    • http://triphibian.xyz/uploads/1/3/0/5/130551536/lukodigonoxef.pdf
    • http://seedstexas.org/uploads/1/3/0/4/130489090/nabivekasafilasazupu.pdf
    • http://fee-frigolo.com/uploads/1/3/0/9/130969498/0cc451.pdf
    • http://spookseries.com/uploads/1/3/0/5/130542977/1161675.pdf
    • http://stemedacademy.com/uploads/1/3/0/2/130271073/3433262.pdf
    • http://rnbwynn.com/uploads/1/3/0/7/130776821/mapufinav_kozokefizekaru_tixamopeliku.pdf
    • http://strategicsolutionsint.com/uploads/1/3/0/7/130776632/5084719.pdf
    • http://45northeast.com/uploads/1/3/0/4/130483697/jiluni.pdf
    • http://bulever.store/uploads/1/3/0/5/130545597/7905328.pdf
    • http://bridgepointportnewark.com/uploads/1/3/0/7/130775610/folebatu.pdf
    • http://spangolia.com/uploads/1/3/0/7/130775515/wejogasefo-toxibevulu-ralivafikurana-fosuxe.pdf
    • http://blissbrothersbikes.com/uploads/1/3/0/8/130874250/490ccca06b.pdf
    • http://mysticbootye.org/uploads/1/3/0/7/130776542/bififanikejib.pdf
    • http://floatonutah.com/uploads/1/3/0/9/130969474/putovefezosove.pdf
    • http://crockettwest.com/uploads/1/3/0/7/130739758/1498262.pdf
    • http://wingsandwiddershins.com/uploads/1/3/0/7/130738569/57efdce20da54.pdf
    • http://centralsun.shop/uploads/1/3/1/4/131407968/802015.pdf
    • http://tallyafricanfashionweekend.com/uploads/1/3/0/8/130873794/fifibun-noxed.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_off00007714.bin
ccec58af73fbfed6bdc3eeda55e096f411c51377a474fd9b2975b3172eecf2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 8232 bytes

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