Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4259de7526540d8…

MALICIOUS

PDF

34.8 KB Created: 2020-04-24 03:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0eb8f264956603a6d545bbd72b7712aa SHA-1: 06643ea5e50d05986b473dcbee5896ce5a40e582 SHA-256: d4259de7526540d862575e5a1316361dd5f1071cc71c3dd2a56c2a889b580e9f
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, many of which follow a pattern of numeric slugs and are hosted on various domains. This is indicative of a link farm or SEO spam campaign designed to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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://keatingphysicaltherapy.net/uploads/1/3/0/5/130550880/130550880.html#cabal+mobile+english
    • http://bhpaschoolinspain.com/uploads/1/3/0/3/130379604/6c40a1.pdf
    • http://expressrelocators.com/uploads/1/3/0/3/130312913/gilewonij.pdf
    • http://moisturemii.net/uploads/1/3/1/6/131636974/5142650.pdf
    • http://arianneortiz.com/uploads/1/3/0/4/130490681/feganuveneval.pdf
    • http://hello-baby-toys.com/uploads/1/3/0/8/130814643/73a791b.pdf
    • http://teammystic.com/uploads/1/3/0/2/130289682/gumefidewa_sikodora.pdf
    • http://kobiarditi.com/uploads/1/3/1/4/131407281/jalome.pdf
    • http://greenschoolsacademy.org/uploads/1/3/0/5/130539042/toxiwoxa.pdf
    • http://new-jersey-trucking-accident-lawyers.com/uploads/1/3/0/7/130739159/31c734a9ee575.pdf
    • http://rdohomesolutionsllc.com/uploads/1/3/0/5/130550890/mopeput.pdf
    • http://thedailystarlebanon.com/uploads/1/3/1/3/131379410/topalavoxi-xotepi.pdf
    • http://twosomefun.com/uploads/1/3/1/4/131452997/vofigi_nufozakoziwedo_daboke.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_off0000638e.bin
2acfdf0253b62b1018884ac704b846818e3eb20109fc7accf712c2f9c5e2e434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 7012 bytes

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