Malicious PDF — malware analysis report

Static analysis result for SHA-256 316d6b0385793884…

MALICIOUS

PDF

38.0 KB Created: 2020-05-31 05:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d154e58dbc6e7df5e6afa3c97cc4a0b1 SHA-1: 9f05e65699327c9114a0fb85b793d2260c5ec680 SHA-256: 316d6b0385793884ef579e73aa61ddeefe83e6f318eae9bc9dacb2c8c493ee91
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. The primary purpose appears to be directing users to various external URLs, such as http://vjpoppins.com/uploads/1/3/1/6/131637135/131637135.html#fundos+hd+1080p+jogos+friv, which likely host malicious content or are part of a phishing campaign. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vjpoppins.com/uploads/1/3/1/6/131637135/131637135.html#fundos+hd+1080p+jogos+friv
    • http://ioxsecurity.net/uploads/1/3/0/2/130287291/vilomaladu.pdf
    • http://expresswash.net/uploads/1/3/0/6/130640013/6238432.pdf
    • http://webdisk.flbenthos.org/uploads/1/3/1/6/131606620/5427683.pdf
    • http://mmssciencecurriculum.com/uploads/1/3/1/4/131409526/jufikan.pdf
    • http://analysisoftheatre.org/uploads/1/3/1/1/131164394/2210950.pdf
    • http://bataoverseas.com/uploads/1/3/1/8/131858916/af9cdfc6.pdf
    • http://tlkbuilders.com/uploads/1/3/2/3/132302951/2d877b.pdf
    • http://buyblueonline.com/uploads/1/3/0/4/130435680/verezimu.pdf
    • http://agrseedandsupply.com/uploads/1/3/0/7/130775092/1688766.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_off00006653.bin
e2b5531113eb868b7a09cc5fd4fde9f373cdf176aac0f90f454ad5d16d37827f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 12316 bytes

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