Malicious PDF — malware analysis report

Static analysis result for SHA-256 200d56dcb5e6ad49…

MALICIOUS

PDF

41.9 KB Created: 2020-05-31 00:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f423b459c6b5690f439d366dc8c0095b SHA-1: 2a154691a05f7a479313a5cb6728d288eeb09eec SHA-256: 200d56dcb5e6ad493579dd0be2987a4b82cc0d5ba94921bbadb3c4d3a381c48b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs pointing to external resources. The primary heuristic firing indicates a mass of external PDF links, suggesting a coordinated effort to redirect users. The document body contains text that appears to be a lure for watching content online, further supporting the redirection motive. 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://4spoke.com/uploads/1/3/0/6/130605198/130605198.html#watch+legend+on+123movies
    • http://riverbendbernedoddle.com/uploads/1/3/0/3/130323293/16001e271b4ec.pdf
    • http://autodiscover.chicagocomics.com/uploads/1/3/0/5/130543190/jufononole_zakipasigo_xipidi.pdf
    • http://hostmaster.inspirationafloat.co.uk/uploads/1/3/0/4/130488884/jokaguroles.pdf
    • http://sweiver.com/uploads/1/3/1/4/131438274/gujubi.pdf
    • http://blackflixx.com/uploads/1/3/1/6/131637279/piloruwebiv-raxikesovexus-sitowasugariw-vifaraj.pdf
    • http://foodallergynwfl.com/uploads/1/3/0/5/130543848/285139.pdf
    • http://facefittesting.nl/uploads/1/3/0/5/130551114/6a399.pdf
    • http://irritableboweldietsolutions.com/uploads/1/3/0/6/130620522/zoporazakofexa_mopazu_wilunozilisoxaz.pdf
    • http://gregsold2newfurniture.org/uploads/1/3/1/8/131871956/5394646.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_off0000605a.bin
af2291c0e1035686704b55b8ea7ac2d44ab6b7d045951ef101e9c2bc4717e1e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 11348 bytes
font_01_sfnt_off0000869e.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 16204 bytes

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