Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47a150d63f38a74…

MALICIOUS

PDF

82.1 KB Created: 2020-03-26 07:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 34634ff75a4ba610131fd3e427514d9d SHA-1: ebae5c6ba5d801085d489761d7bad132f3858418 SHA-256: d47a150d63f38a74e260165858d0d768185c5dc00cf9535a4e059a188f5ebc31
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO poisoning or to redirect users to malicious websites. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains a URL that is also present in the list of embedded links, suggesting a deliberate attempt to lure the user to a specific external resource.

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://mightypharaoh.com/uploads/1/3/0/5/130588894/130588894.html#which+chronicles+of+prydain+character+are+you
    • http://darinadenali.com/uploads/1/3/0/6/130639161/7029456.pdf
    • http://trantafilphotography.com/uploads/1/3/0/4/130488469/5419352.pdf
    • http://www.marlindivecenter.com/uploads/1/3/0/2/130270912/konibolef-mavomatomewetor-fexabizuwi-gobixajan.pdf
    • http://www.drgerrydoran.com/uploads/1/3/0/8/130874382/dukova.pdf
    • http://kingstradingpl.com/uploads/1/3/0/6/130604903/maliveju.pdf
    • http://micheletroy.com/uploads/1/3/0/4/130435777/zirolezurawi.pdf
    • http://westshoreprojects.com/uploads/1/3/0/3/130323172/rugulesexibofiwi.pdf
    • http://miraclemembership.com/uploads/1/3/0/3/130379843/gelaronebisevev-tapitudolux.pdf
    • http://labphotographylab.com/uploads/1/3/0/2/130272638/pedawafiba_zinefaj_pabulokeje_namobegi.pdf
    • http://crazedtrader.com/uploads/1/3/0/6/130604111/8987198.pdf
    • http://kryaddof.com/uploads/1/3/1/3/131383586/9263800.pdf
    • http://casamadalenadestin.com/uploads/1/3/0/6/130620613/caf61b3b9457.pdf
    • http://onceuponamonth.net/uploads/1/3/0/7/130776338/202645.pdf
    • http://www.megansinternship2018.com/uploads/1/3/0/6/130621354/132130.pdf
    • http://nhgamebutcher.com/uploads/1/3/0/6/130620176/kojeruje.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_off000119eb.bin
fea9b775cd0bbd1f9ae2f518cfab8e486feb6db199f283ce01f9102dcd662cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119EB 8648 bytes

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