Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd37084db4234bf…

MALICIOUS

PDF

40.7 KB Created: 2020-04-16 11:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 490866780c82e136297cb4124c484642 SHA-1: 8b4344469de381b3165e2f3f1b414ce7bd6c367b SHA-256: 5bd37084db4234bf2679a3c884f48388e8886363645d292421382af7f485579b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a phishing or redirection attempt. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a rental agreement.

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://cromaatlegalconsult.org/uploads/1/3/0/7/130738993/130738993.html#rental+agreement+format+in+marathi
    • http://mobilefontc.org/uploads/1/3/1/3/131379181/b9fb4ca3f3b10f.pdf
    • http://hometechrenovations.ca/uploads/1/3/0/6/130604233/6204888.pdf
    • http://vestablu.com/uploads/1/3/1/4/131454106/vunepuxax_lagub_febibe_xixog.pdf
    • http://contractorsupplytn.net/uploads/1/3/1/0/131069870/ca2d44f30407.pdf
    • http://danceofform.com/uploads/1/3/0/9/130969705/fe1e01ffa04.pdf
    • http://cafeolympic.net/uploads/1/3/0/7/130775760/gizen-tanoruruto-lurome.pdf
    • http://cptlondon.com/uploads/1/3/0/5/130544318/73ddc266.pdf
    • http://newmanstage.com/uploads/1/3/0/5/130550859/3143237.pdf
    • http://summerztreasures.com/uploads/1/3/1/3/131380934/5017073.pdf
    • http://vivalavida.dance/uploads/1/3/0/2/130272426/8304428.pdf
    • http://ohinternet.net/uploads/1/3/0/6/130621026/pedofarug_sisunapamules_zigiledipefuj_gepatakato.pdf
    • http://restaurantatburdicks.com/uploads/1/3/0/7/130776489/abd38f2abd.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_off00007786.bin
4339d76905da3decfa361d331c096e2e0ad9b5bde654ad1534b66785641f14f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 8052 bytes

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