Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2144dd352f7f048…

MALICIOUS

PDF

57.0 KB Created: 2020-03-30 02:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cfd592f5a1f052e9e8dab795d3b125fc SHA-1: 2a0d67d37d72bd475a016a5403afecfa97a8dcb8 SHA-256: d2144dd352f7f048a8aaac8728ff159eb53a96a126ff5d52a98e5b8079f411ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

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://somersetfoodtrail.org/uploads/1/3/0/5/130544078/130544078.html#sistema+oseo+con+nombres
    • http://cnpflooring.com/uploads/1/3/0/4/130435722/boxurojotanavitomi.pdf
    • http://mollyelliott.com/uploads/1/3/0/5/130588830/3650201.pdf
    • http://bowleyconsulting.org/uploads/1/3/0/9/130969502/sumojejapir-jaradipupa-lusoxe.pdf
    • http://whatchangedmylife.com/uploads/1/3/0/5/130589302/2910432.pdf
    • http://exportroyal.com/uploads/1/3/0/4/130476161/bc216b7c5.pdf
    • http://disobedientwomen.org/uploads/1/3/0/9/130969959/pelafeji.pdf
    • http://12domainjt1.com/uploads/1/3/0/6/130603818/1972040.pdf
    • http://konradhansen.com/uploads/1/3/0/4/130479082/dazagudiduma-tuwepidowaze-zaxolufigigir-mosurejesovog.pdf
    • http://wuradio.org/uploads/1/3/0/7/130776526/729f7c792a6.pdf
    • http://personaltransformation.ca/uploads/1/3/0/6/130605178/1987740.pdf
    • http://grandviewlodgeandresort.com/uploads/1/3/0/6/130621570/kejibadimi.pdf
    • http://webdisk.barbaramulderink.nl/uploads/1/3/1/4/131437822/tiwozurara_dumiku_kijowemalob.pdf
    • http://hrpfabrications.com/uploads/1/3/0/7/130776889/6059646.pdf
    • http://ellawhat.com/uploads/1/3/0/3/130379527/7479007.pdf
    • http://keepitlocalmontana.com/uploads/1/3/0/6/130620451/64ea9e9c0dd9b.pdf
    • http://optikdworschak.at/uploads/1/3/0/6/130639362/b08364dfa3242.pdf
    • http://antifashionista.com/uploads/1/3/0/9/130969458/tabajetasediginimis.pdf
    • http://sarfa.org/uploads/1/3/0/6/130639636/41809d.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_off0000b4d2.bin
29e33cec83a5dc8b293c5b9d638cbe7a99ab22fb2983f5f048fb8f8acf2b4c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D2 8920 bytes

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