Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98d3abdc2c508e9…

MALICIOUS

PDF

39.9 KB Created: 2020-04-02 09:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 021427fe457b332f414b8f1d90f82bf7 SHA-1: b1dba47395ffb7d637b135a96187489bea8794c0 SHA-256: a98d3abdc2c508e9f167e8d451783fd41b7066d105585ed95752775cd935727c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to URLs that are also present in the heuristics. This suggests the primary purpose is to redirect users to a network of potentially malicious websites, likely for SEO spam or to host further malicious content.

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://abbotsfordappliancerepair.com/uploads/1/3/1/3/131381046/131381046.html#difference+between+dijkstra+prim+and+kruskal
    • http://christopherajonesjr.com/uploads/1/3/0/4/130436163/1697267.pdf
    • http://telangaana.info/uploads/1/3/0/6/130620551/motulapuv.pdf
    • http://negotiatenow.org/uploads/1/3/0/8/130874478/wabosapubajulid-sotemumuwigefuf-baniwi-sikepe.pdf
    • http://tonypalladino.com/uploads/1/3/0/4/130483396/mapelemubabitop_popigel_ribixi.pdf
    • http://yourrealtorabouttown.net/uploads/1/3/1/1/131164093/gulagu.pdf
    • http://destinedforsuccess.rpjandco.com/uploads/1/3/0/5/130542920/gexevanusul.pdf
    • http://cacaliveyouth.org/uploads/1/3/0/5/130540619/bipudemowabexelezi.pdf
    • http://northpoleopticalandeye.com/uploads/1/3/0/4/130483811/3275.pdf
    • http://shoresofmichigan.com/uploads/1/3/0/6/130640142/99a41150ee19a88.pdf
    • http://jonesandsonsdecorating.com/uploads/1/3/0/7/130738625/2925099.pdf
    • http://74-123-72-79.mgwnet.com/uploads/1/3/0/4/130476496/2495885.pdf
    • http://recipetracks.com/uploads/1/3/0/6/130621212/toganevevujabib_wasigipar_sajakanigowoj.pdf
    • http://thecoveinnnaples.com/uploads/1/3/0/7/130775125/nebar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c23.bin
edbaaa87140bfce4d1f787525ed66391ff37dfc22dcdea15d29753ac435d0e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 8500 bytes
font_01_sfnt_off00007ce9.bin
4bc316074ab7a945bfab345755761abf3c0c30bbefcbffa3ce2a779be7417175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE9 16144 bytes

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