Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f75cc5cad8f323…

MALICIOUS

PDF

36.4 KB Created: 2020-04-11 05:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de20b0acb63f6aca849e48cc09310f88 SHA-1: ebe90c434c7fcfba2bb6451877610ea8f7b557d3 SHA-256: a9f75cc5cad8f323cd7e968f8866667815e91d730c31a75938d5e7e93bbb10c2
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The primary heuristic identified a link farm pointing to various domains, suggesting a coordinated effort to distribute malicious content or phishing lures.

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://chewoncakes.com/uploads/1/3/0/6/130639278/130639278.html#bull+extreme+farmacias+similares
    • http://acot.online/uploads/1/3/0/8/130874198/9367941.pdf
    • http://turnberrypress.com/uploads/1/3/0/9/130969971/4789088.pdf
    • http://drboblawrence.com/uploads/1/3/0/2/130287311/225d0de5fb1e9.pdf
    • http://spotlesscleaningexperts.com/uploads/1/3/1/4/131437413/5992072.pdf
    • http://myapotheka.com/uploads/1/3/0/6/130621673/jisirixetisededi.pdf
    • http://gracefullyglitteredcreations.com/uploads/1/3/1/4/131407424/nokedujazon.pdf
    • http://mail.cmsa-westmi.com/uploads/1/3/0/6/130604176/d7b8494c6cb.pdf
    • http://likessmmm.com/uploads/1/3/0/7/130775645/4407828.pdf
    • http://antibes-psychologue.com/uploads/1/3/0/6/130621462/68f9b6bff5.pdf
    • http://kao-gourmet.com/uploads/1/3/0/2/130291551/3484764.pdf
    • http://peacelovemonkey.com/uploads/1/3/1/3/131383409/xajuxiwuxu.pdf
    • http://whp2015.com/uploads/1/3/0/7/130776279/9f940eb9b4a296.pdf
    • http://kissonthechicstyle.com/uploads/1/3/1/4/131406104/belumevetot.pdf
    • http://getrealart.com/uploads/1/3/0/4/130490338/zitixeto-lisulidul-zekufiwavifo.pdf
    • http://truenorthexperts.com/uploads/1/3/0/7/130738991/tewiramuzuje-jemukoxizure.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_off0000676e.bin
6613694ef3e6df4b96fe820ff11a0a37a48862dbb2a481ba8526f9f328799a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676E 8188 bytes

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