Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7d06cbe3b6df09…

MALICIOUS

PDF

127.9 KB Created: 2020-04-08 09:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4d820cf4a3907602600b3a9c70df5543 SHA-1: 3b23d72b393d599ae11edc823514ee526613318e SHA-256: 6e7d06cbe3b6df0945940d93d4438c3e95cf119c0191bbbf6aeac2f2cfd32b1b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external domains, many of which appear to be part of a link farm designed for SEO manipulation. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. While no scripts were directly extracted, the presence of external links suggests the document's primary purpose is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9237

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://dcimalamutes.com/uploads/1/3/1/4/131437457/131437457.html#cartas+de+control+para+procesos+de+salida+m%C3%BAltiple
    • http://alsubhitradingltd.com/uploads/1/3/0/5/130589058/31466f016d72a5.pdf
    • http://www.timelessfaces.com.au/uploads/1/3/0/5/130544379/gopuxegiga.pdf
    • http://triplejcrochet.com/uploads/1/3/0/5/130551427/6375b.pdf
    • http://kittyskornervip.com/uploads/1/3/0/4/130476970/5957713.pdf
    • http://education-innovations.org/uploads/1/3/0/7/130739983/fupinofefurufewuri.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • 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_off0001bd2c.bin
246d7d14cde8c6e582b7663b9781afc3479d0be1ecf71d580aa2c85c1b42c905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD2C 2084 bytes
font_01_sfnt_off0001c68f.bin
69274825ded922cce66b2ef3f1faf581c507e438342ad56c2165e3e0c06032ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C68F 11992 bytes

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