Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee75e510f54f594…

MALICIOUS

PDF

59.9 KB Created: 2020-03-10 04:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1cc8997081210c36aeaaffe6d62af8f1 SHA-1: d1b9273c1e0b4eb2d90ecc540f688aaa5a628c30 SHA-256: 9ee75e510f54f5945adff80a9258fb07b021b90a0a470a436567f7c0485d839e
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains a URL that is also present in the list of extracted URLs. This suggests the document's primary purpose is to redirect users to malicious websites, likely for phishing or malware distribution.

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://opssecurityagency.com/uploads/1/3/0/5/130551363/130551363.html#heterophile+antibody+test+can+aid+in+the+diagnosis+of
    • http://www.actorheadshotphoto.com/uploads/1/3/0/8/130813399/cd248af2f092b4.pdf
    • http://junbinow.com/uploads/1/3/0/6/130604789/sutul-zujizulakijukuv-tapilaweledosaf-wanapuj.pdf
    • http://moonlightairfoundation.org/uploads/1/3/0/5/130589431/pasurusapuzemalig.pdf
    • http://sanchiscomunicacion.net/uploads/1/3/0/7/130740609/5c13dcfd44c7.pdf
    • http://blackhawklocksmiths.com/uploads/1/3/0/2/130270777/7160818.pdf
    • http://www.d12llc.com/uploads/1/3/0/2/130270974/dafonobitevakow-buriwe-dovaku.pdf
    • http://elchefdelcaviar.com/uploads/1/3/0/2/130289436/fenuxovumurur_somilel_xixexemogavipud_jopurekol.pdf
    • http://informatisphere.com/uploads/1/3/0/6/130639292/7377c475924.pdf
    • http://pof-addcallsupport.com/uploads/1/3/0/6/130639032/xokutopasowug.pdf
    • http://agapekennelswhitewater.com/uploads/1/3/0/6/130604505/fcca04e8e.pdf
    • http://hifitwins.com/uploads/1/3/0/5/130545097/vabuvozetuva.pdf
    • http://www.zmoremo.sz-lendava.si/uploads/1/3/0/6/130621101/80feb.pdf
    • http://rorybledsoe.com/uploads/1/3/0/4/130476607/buwam.pdf
    • http://www.etaudst.org/uploads/1/3/0/4/130483132/kuzadugusewa_tojibavofutas_fafigum.pdf
    • http://bcrsa.org/uploads/1/3/0/6/130639590/pamaj_faxanos_gapakiw.pdf
    • http://kx3financial.com/uploads/1/3/0/7/130739520/9cbbe13.pdf
    • http://huronvillas.com/uploads/1/3/0/4/130488470/vemaremowi.pdf
    • http://typeemup.com/uploads/1/3/0/7/130739341/padomutaped.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_off0000c1a6.bin
9b275c54b336fb457b1ff5bbc59d9729356374828cafababbae575968c9919d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A6 8384 bytes

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