Malicious PDF — malware analysis report

Static analysis result for SHA-256 e014d11d4bdcddf2…

MALICIOUS

PDF

41.1 KB Created: 2020-03-18 12:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de85e0c191c29ecd1e967036c6c15fae SHA-1: 6fa67510ee4af1132bbb3ae9d831ea8ddaf2b98a SHA-256: e014d11d4bdcddf2e2306fc6d11d2b22c2a7d8b08e5de5b1405f071170e0bb9c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used to manipulate search engine rankings or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. The primary IOCs are the numerous URLs embedded within the document.

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://cyclebavaria.com/uploads/1/3/1/0/131071298/131071298.html#que+es+la+historia+de+enfermer%C3%ADa+resumen
    • http://webmail.amscied.net/uploads/1/3/0/5/130540504/4727920.pdf
    • http://remote.ams-dc.com/uploads/1/3/0/6/130639544/20086.pdf
    • http://www.bestself.studio/uploads/1/3/0/8/130873784/312980.pdf
    • http://brokenhartarena.org/uploads/1/3/0/3/130323602/zerigase-gezulapifefojav-vumunogemakubod-pulanetibexan.pdf
    • http://visualtrad.com/uploads/1/3/0/6/130639971/8032161.pdf
    • http://www.austxcopsandrodders.org/uploads/1/3/0/2/130287428/vanogu-wejabawik.pdf
    • http://www.extract-cloud.com/uploads/1/3/0/6/130620667/459a49f5e32708.pdf
    • http://groceryexpansioninlandempire.com/uploads/1/3/0/5/130551788/rixobifekexival_neruzokexoke_muwamefube_tatikovatiro.pdf
    • http://grassrootsdrift.com/uploads/1/3/0/4/130476912/2066177.pdf
    • http://montanahorsesandmules.com/uploads/1/3/0/4/130475981/xeguso.pdf
    • http://adianembhardtherapy.com/uploads/1/3/0/5/130551294/e640933f80bd06.pdf
    • http://wikibazzar.com/uploads/1/3/0/7/130739239/eede1f56.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_off000075a5.bin
41d91abed14e3558dae8f1a571412963ce7bde21850ee9f626f7292f232625ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 8880 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.