Malicious PDF — malware analysis report

Static analysis result for SHA-256 004e05abdda4212c…

MALICIOUS

PDF

35.4 KB Created: 2020-04-08 02:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5d6f95caba73a872db3447276129e485 SHA-1: dfb0d370bd164177576b9d8770bbea78a28b739f SHA-256: 004e05abdda4212c8aae56d48c5d5e82a6ff630272f4ffa606c6193d433d6864
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The embedded document body also contains a primary URL that is part of this link farm. This suggests the PDF's primary purpose is to redirect users to a network of sites, likely for SEO spam or to host further malicious content.

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://my-link-online.com/uploads/1/3/0/2/130274319/130274319.html#corel+wordperfect+office+ventajas+y+desventajas
    • http://centraldirectms.com/uploads/1/3/0/5/130588934/nojobidugomirevuvej.pdf
    • http://legacychoreo.com/uploads/1/3/0/6/130604225/94f2bdb.pdf
    • http://empoweredpictures.com/uploads/1/3/0/6/130621486/8049732.pdf
    • http://saltsandsunshine.com/uploads/1/3/0/3/130323151/jowog_doriwofafujisa_judebalurajiki.pdf
    • http://malanature.com/uploads/1/3/0/4/130476804/250dd37173c663.pdf
    • http://rachel-meyers.com/uploads/1/3/1/1/131164372/zofikupexugubi.pdf
    • http://jissenbudo.com/uploads/1/3/0/5/130551311/effa53968d.pdf
    • http://glittergoldenpuppies.com/uploads/1/3/0/4/130436252/11fc2581.pdf
    • http://josephkalmowitzart.com/uploads/1/3/0/7/130775668/viponevawode-bewitumujor-ruzekodaf-gijojuker.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_off00006241.bin
b303e3ca2c2196b2a640f329930cac0a4cae8b0d74119829a0ed142f5260724d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 8316 bytes

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