Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0cdb2baef86a82…

MALICIOUS

PDF

41.1 KB Created: 2020-04-07 13:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e635cc795b65e68195920e063598aa9c SHA-1: 5643dc59e6bde91901b952e428a798290047c039 SHA-256: fe0cdb2baef86a8244c90c0afb338c295aca2888c98a0debb8e2891825abbfa9
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though partially obfuscated, contains references to these URLs, reinforcing the link-farming attack pattern. No scripts were extracted, limiting the analysis of direct payload delivery.

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://newfoundseeds.com/uploads/1/3/1/4/131438268/131438268.html#que+es+el+juego+de+los+quemados
    • http://logophilecomics.com/uploads/1/3/0/5/130543545/fovarukuzijo-tivavovoguvumif-nejilinade-gikujezizixetop.pdf
    • http://lmcommunityfoundation.net/uploads/1/3/1/3/131379759/ab3ef2db1ba5.pdf
    • http://rosesandrivets.com/uploads/1/3/0/7/130775361/vakesotexo.pdf
    • http://mistycarver.com/uploads/1/3/0/2/130291449/fotuvuwos.pdf
    • http://level7atl.com/uploads/1/3/0/4/130492689/1686265.pdf
    • http://abqroofs.com/uploads/1/3/0/3/130379132/dde59602b.pdf
    • http://drberryconsulting.com/uploads/1/3/1/4/131438155/2015209.pdf
    • http://calibermed.com/uploads/1/3/1/3/131383486/mifuri.pdf
    • http://pdxwriter.com/uploads/1/3/0/6/130605174/87b37ae71d673.pdf
    • http://360landscapingdesign.com/uploads/1/3/1/3/131379552/9759967.pdf
    • http://weboxitsj.com/uploads/1/3/0/4/130476506/linasoxusixugakaxeb.pdf
    • http://welllegholder.com/uploads/1/3/0/2/130287295/15295.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_off00007550.bin
9d980ad99244619b458ab7da3999164fd04e0db9d8f9273dfd9cdb85fcb7d5ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 8956 bytes

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