Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e311453b3181f69…

MALICIOUS

PDF

46.4 KB Created: 2020-03-28 06:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fb9fdba6917c3058c6e0d46c8a777a43 SHA-1: cc52b70962740e7c85532f5fc35cfafb2908c72a SHA-256: 5e311453b3181f69b5902be1b96aecdc733b8718d9cca1ee7ac18a551e23b147
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains garbled text but includes a reference to 'Reseña critica de peliculas' and the wkhtmltopdf generator, suggesting a potential lure or content manipulation. The primary function appears to be directing users to a network of linked documents.

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://careaidecommunity.com/uploads/1/3/0/2/130271171/130271171.html#rese%C3%B1a+critica+de+peliculas
    • http://lojrrim.store/uploads/1/3/0/6/130620449/3201308.pdf
    • http://vipgrouptravelseminaratsea.voyagerwebsites.com/uploads/1/3/0/4/130488741/bitajizozupotag.pdf
    • http://julesmagickmoon.com/uploads/1/3/0/2/130291551/1537907.pdf
    • http://unblanket.com/uploads/1/3/0/5/130588822/4571757.pdf
    • http://seaturtlepaperstrawcompany.com/uploads/1/3/0/2/130272250/2981053.pdf
    • http://garagedoorrepairsanfernando-ca.com/uploads/1/3/0/6/130639034/f318f35c06913.pdf
    • http://moseslakeortho.com/uploads/1/3/1/0/131070559/bc286b.pdf
    • http://forkthecommons.com/uploads/1/3/0/4/130483745/palatudefu.pdf
    • http://floodexpress.com/uploads/1/3/0/6/130639017/kelivufoposemidanef.pdf
    • http://uophilosophy.com/uploads/1/3/0/2/130288406/wewupejumarater.pdf
    • http://undercovernetwork.com/uploads/1/3/0/2/130271259/tavijodewe.pdf
    • http://springspiritmentoring.com/uploads/1/3/0/5/130543546/1073609.pdf
    • http://mcquoteblocks.com/uploads/1/3/1/0/131070576/dageze.pdf
    • http://jd-designer.com/uploads/1/3/0/7/130775878/lokabugewuv_gulapo.pdf
    • http://webmail.bold-essentials.com/uploads/1/3/0/5/130550775/rivumujesoke.pdf
    • http://colo-ip52.mnemonix.com/uploads/1/3/0/9/130969845/d8da85a421ec.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_off000088a8.bin
a33f4f3162335513951f236e2b000fe5c06599fc4dcbbad501fd427e17bbd0aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A8 9384 bytes

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