Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c5ca4d018adbd0…

MALICIOUS

PDF

36.1 KB Created: 2020-04-01 20:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dad8f94c5bdd5facc4e24fe5a828259f SHA-1: 969f8c3324b580bc28068678393db5c74105c5a1 SHA-256: e3c5ca4d018adbd06e34f108c72510fa1c35d34fcb81ac09a4cfeb0caf775ba0
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://jairusis40.com/uploads/1/3/0/6/130604589/130604589.html#que+controlador+midi+comprar, and numerous others point to domains that appear to be part of a link farm. This suggests the document's purpose is to redirect users to potentially malicious content or to manipulate search engine rankings. No scripts were extracted from this sample.

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://jairusis40.com/uploads/1/3/0/6/130604589/130604589.html#que+controlador+midi+comprar
    • http://datasciencetitan.com/uploads/1/3/0/5/130543568/7712187.pdf
    • http://lolleepups.com/uploads/1/3/0/4/130476619/5001526.pdf
    • http://selbysummershootout.com/uploads/1/3/0/6/130621264/ec9b6bb3c2567.pdf
    • http://woodhavenlane.com/uploads/1/3/1/4/131408537/zamojipabeb.pdf
    • http://venetianartdesign.com/uploads/1/3/0/6/130603764/34416.pdf
    • http://apbgprojects.com/uploads/1/3/0/7/130775413/pesajuzup_zufiro.pdf
    • http://aspiringkidsls.com/uploads/1/3/0/4/130476732/rozunub.pdf
    • http://gps-lab.org/uploads/1/3/0/4/130476462/genokadegedotepevedo.pdf
    • http://www.mrskumkesclass.com/uploads/1/3/0/8/130873941/4276655.pdf
    • http://otownpyle.com/uploads/1/3/0/2/130272477/b1e9a7584.pdf
    • http://indiabygrace.com/uploads/1/3/0/5/130588846/6092837.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_off00006418.bin
1bd55e938da3551fba87689f47c5c512f9f67dc220d2f420283cc67295b97419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 8152 bytes

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