Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd8653d1f1fcd96…

MALICIOUS

PDF

45.6 KB Created: 2020-03-11 15:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bfa75de21ece4ca98bce40a9970ca066 SHA-1: b4fba001a455c75d45bd7999430a32c70c308df0 SHA-256: 9cd8653d1f1fcd9664fcd5e42ae306967d7fc89677e931e1efa1ea8392a11e7d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation or to host malicious content. The document body, though partially corrupted, contains text related to 'pre algebra with pizzazz' and includes URLs that are likely part of this scheme. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

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://archie-rodriguez.pleasingfood.com/uploads/1/3/0/2/130274281/130274281.html#pre+algebra+with+pizzazz+did+you+hear+about+page+188+answer+key
    • http://thatyoumaybelieve.com/uploads/1/3/0/5/130588780/306b3ae1.pdf
    • http://autodiscover.everyday-wines.com/uploads/1/3/0/2/130289734/jeziduvosinesinezub.pdf
    • http://flickneroptometry.com/uploads/1/3/0/6/130621455/5429505.pdf
    • http://mylifestea.com/uploads/1/3/0/5/130540824/169116.pdf
    • http://mountbarkerstrathcatholic.com/uploads/1/3/0/7/130775795/kojorapigi_kuvuzujiwojugew_sasifilifawulo_xenivifasavakad.pdf
    • http://www.durabuilt.org/uploads/1/3/0/7/130739351/badagokosixur.pdf
    • http://orquideagems.com/uploads/1/3/0/9/130969855/5063445.pdf
    • http://mylenderscott.com/uploads/1/3/0/5/130588968/6455cc.pdf
    • http://springspiritmentoring.com/uploads/1/3/0/4/130490314/7374870.pdf
    • http://naturesworks.net/uploads/1/3/0/2/130288720/pedavajikejiwi.pdf
    • http://jllashworthplace.com/uploads/1/3/0/4/130488512/2016947.pdf
    • http://excelappdevelopment.com/uploads/1/3/0/5/130539287/povaruvukiru-zaxarurekow.pdf
    • http://cechainstoreflooring.com/uploads/1/3/0/5/130538869/vozimobumomewa-zugotudaxoleda-wimolaperajesu.pdf
    • http://www.bs-ws.nl/uploads/1/3/0/7/130775743/2896249.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_off000084a5.bin
ae53739bc033f16f4fa17dbfa8fe64e887fbe67991f951b107daebf3736c8d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A5 9664 bytes

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