Malicious PDF — malware analysis report

Static analysis result for SHA-256 105d274ac7467489…

MALICIOUS

PDF

47.8 KB Created: 2020-03-25 04:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a6ea94ada9a5c917c4202dce35e60afc SHA-1: 635de950b26866aec0dbcecdf46ed3cb7d382711 SHA-256: 105d274ac746748950bc50aaa760ca619030c12a1bb9980471a8dcdf898d07c5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially obfuscated, contains a URL that is also present in the list of extracted URLs. This suggests the primary purpose of the document is to redirect users to a network of external sites, potentially for SEO manipulation or to host further malicious content.

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://fundraisers-aylsham.com/uploads/1/3/0/6/130639406/130639406.html#medios+audiovisuales+y+la+educacion
    • http://blazeon.ca/uploads/1/3/0/2/130288523/xugulixe.pdf
    • http://drinkresponsively.net/uploads/1/3/0/2/130270804/88260520b5.pdf
    • http://beyondabarn.com/uploads/1/3/0/5/130590511/bb6e32d4a0.pdf
    • http://ifyousuffer.com/uploads/1/3/0/2/130274269/wewufegivid-mixeteno-gurexola-vajutasigosika.pdf
    • http://www.interfaithdialogue.us/uploads/1/3/0/6/130621530/959886.pdf
    • http://noxanima.com/uploads/1/3/0/4/130436014/561440.pdf
    • http://thomsonhay.com.au/uploads/1/3/0/6/130639115/9108735.pdf
    • http://mandmemporium.com/uploads/1/3/1/0/131070651/3341445.pdf
    • http://tubetopsrus.com/uploads/1/3/0/8/130813913/6e09e76e673.pdf
    • http://dblab-ar.com/uploads/1/3/0/7/130776110/delozimib.pdf
    • http://www.essentiallyempoweredwellness.com/uploads/1/3/0/6/130621043/9aff6.pdf
    • http://webdisk.flycentre.com.au/uploads/1/3/0/6/130621683/02f5c1f2757e5fc.pdf
    • http://mpnetwork.com.au/uploads/1/3/0/2/130272636/mudobodizalugil.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_off000090ab.bin
baed723c05113549d5d48f3535b7440f4a17f8e3b441cfe84a0a75af5ea6287b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AB 8684 bytes

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