Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cdc2f8022d35ed…

MALICIOUS

PDF

43.8 KB Created: 2020-06-06 15:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc4467c9cda886e50eb3b49bace928b SHA-1: a92f18737574459035fc4835fbe73a72dd1223bd SHA-256: 83cdc2f8022d35ed48fe9812534a9db25badc31edcabdfa35b9c6242075a0395
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which are designed to mimic search engine results or content aggregation. The document body, though heavily obfuscated, contains a reference to 'Zombieland 2 full movie online', suggesting a lure to entice users to click on the malicious URLs. The ML classifier strongly indicated maliciousness, and the presence of many external links points towards a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://4u8qy1.bdgct.com/uploads/1/3/1/8/131871568/131871568.html#zombieland+2+full+movie+online
    • http://lifestreampartner.com/uploads/1/3/0/2/130271152/4715935.pdf
    • http://erikbuyshouses.com/uploads/1/3/0/8/130874211/17fca7.pdf
    • http://snowgripit.com/uploads/1/3/0/5/130589217/31536d501ea6.pdf
    • http://uptownjazzorchestra.org/uploads/1/3/0/5/130588973/lixugituz_goxamareje.pdf
    • http://wholearthvr.com/uploads/1/3/0/7/130775392/e3d54c62b5d3798.pdf
    • http://cpanel.madglassyyc.net/uploads/1/3/0/6/130621646/jivibezemarum.pdf
    • http://marc-brown.com/uploads/1/3/1/3/131383042/9847046.pdf
    • http://millennialmarkets.net/uploads/1/3/0/7/130775728/kumuwomugejewafi.pdf
    • http://projectpetasos.org/uploads/1/3/0/4/130488569/1031006.pdf
    • http://hostmaster.ryanlakanen.com/uploads/1/3/0/3/130323556/ronijebav.pdf
    • http://erd1red.net/uploads/1/3/0/7/130775987/5e6ca.pdf
    • http://joanwills.com/uploads/1/3/1/8/131857815/87f5008ef9.pdf
    • http://4u8qy1.bdgct.com/uploads/1/3/1/8/131871568/terms.html
    • http://4u8qy1.bdgct.com/uploads/1/3/1/8/131871568/dmca.html
    • http://4u8qy1.bdgct.com/uploads/1/3/1/8/131871568/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pumodazu.files.wordpress.com/2020/06/lamejuxi.pdf
    • https://sitekoj.files.wordpress.com/2020/06/zarukadox.pdf
    • https://kadipelo.files.wordpress.com/2020/06/32999193866.pdf
    • https://xobaxelofutu.files.wordpress.com/2020/06/vomefa.pdf
    • https://losikitomose.files.wordpress.com/2020/06/89712579554.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c72.bin
a6b7ca000ecd66b99b6d0444129b8e6a9ca29a6aa0369d531bc12c437526db3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C72 11408 bytes