Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a3032a15392933…

MALICIOUS

PDF

41.7 KB Created: 2020-03-24 05:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03c8842409c5444790bae772f573b773 SHA-1: bda85ee182dfd4154e100b48bda8ebe5518edfe4 SHA-256: 11a3032a153929339b96c32fc733efcc1b203877e477986d638d5d607d32eb01
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, includes a URL that points to a collection of other PDF files. This suggests the document's primary purpose is to redirect users to a link farm, potentially for SEO manipulation or to distribute 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://benkregel.com/uploads/1/3/0/6/130621282/130621282.html#ejemplo+de+portada+de+proyecto+de+vida
    • http://slautomotive.net/uploads/1/3/0/3/130323155/zabij_lirin_betaranuriposag_nisel.pdf
    • http://jonathanlifecoach.com/uploads/1/3/0/7/130776134/veguxivolokab.pdf
    • http://bravojazz.com/uploads/1/3/0/6/130604687/5599684.pdf
    • http://ecolloy.com/uploads/1/3/0/3/130379356/d7c05.pdf
    • http://freemasoninfo.com/uploads/1/3/0/2/130289803/f4d4667.pdf
    • http://kenyaninside.com/uploads/1/3/0/4/130476307/vujotuwisiwalikokewi.pdf
    • http://mhcs.me/uploads/1/3/0/5/130588864/jakawixawuxemud-xagutabe-wozamatun.pdf
    • http://shoreshot-photography.com/uploads/1/3/0/5/130540352/e4556bd132e67a.pdf
    • http://residencebaiaverde.com/uploads/1/3/0/6/130621401/mipudezolukidonuwan.pdf
    • http://www.texascraftfairy.com/uploads/1/3/0/2/130287314/d39eb97537e38.pdf
    • http://orphancaresolutions.com/uploads/1/3/0/6/130621310/2129716.pdf
    • http://thelittlemediacompany.co.uk/uploads/1/3/0/6/130604876/pibuzojejemes-wudokatutifu-dovovefabitate-rofajasubogikem.pdf
    • http://blackdi-mond.com/uploads/1/3/0/5/130551222/pojerapu.pdf
    • http://domharbot.com/uploads/1/3/0/4/130488165/8818691.pdf
    • http://dougtms.com/uploads/1/3/0/6/130605497/9d622ba9e.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_off0000793f.bin
88921f8f668a9f4fc7ad1af972477ceb453ab53db63bee7707e9cc94fddbb3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 8396 bytes

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