Malicious PDF — malware analysis report

Static analysis result for SHA-256 345dbe5c3621c4cd…

MALICIOUS

PDF

43.3 KB Created: 2020-03-23 06:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fa6a7d3c0f32c515c4cabf3044368877 SHA-1: 6b3dc308ba05c5f90ec74d2397bd00ae5481297f SHA-256: 345dbe5c3621c4cd65b315275db86f7d998a1f4bed87e4b59ad3476ce42d2a4e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified as a PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The embedded document body text, though partially corrupted, contains a URL that matches one of the extracted external links. This suggests the document's primary purpose is to redirect users to these external resources, likely for malicious SEO or to serve 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://ductcleaningdc.com/uploads/1/3/0/5/130588633/130588633.html#obra+del+rey+leon+cdmx
    • http://www.meganmccannpr.com/uploads/1/3/0/7/130776611/8207793.pdf
    • http://www.kupetspinkinvitational.com/uploads/1/3/0/5/130539341/raxod.pdf
    • http://www.robsimmonsdesigns.com/uploads/1/3/0/5/130545421/0a92a62.pdf
    • http://onceuponapage.net/uploads/1/3/0/8/130814921/bojaxitokusawomi.pdf
    • http://www.korutow.designpreviewer.com/uploads/1/3/0/9/130968906/jazofevizeto.pdf
    • http://fbiloveyou.xyz/uploads/1/3/0/4/130489090/ramoka.pdf
    • http://joyfulearthsoaps.com/uploads/1/3/0/3/130312920/609708e2bc3b5.pdf
    • http://plegendbeats.com/uploads/1/3/0/8/130873994/9268269.pdf
    • http://www.chronichemps.com/uploads/1/3/0/7/130740510/bawanosotolev-satikinem-rifowi-netonobu.pdf
    • http://nectr.ca/uploads/1/3/0/6/130604862/dimiguj_zitomasopex_fudapewotola.pdf
    • http://www.aiyoga.org/uploads/1/3/0/6/130639508/1994d38789f6.pdf
    • http://shawnsevario.com/uploads/1/3/0/3/130324167/palofakepuzake.pdf
    • http://aslangatheredgoods.com/uploads/1/3/0/6/130622051/4195862.pdf
    • http://www.scapularpatch.com/uploads/1/3/0/6/130620693/sinadupum.pdf
    • http://varakandclyde.com/uploads/1/3/0/5/130551856/lumogexeputuna.pdf
    • http://www.grownupfashion.co.uk/uploads/1/3/0/5/130588747/5aed7.pdf
    • http://nomomani.com/uploads/1/3/0/7/130775573/4ed4efe649d2631.pdf
    • http://jesengineeringservices.com/uploads/1/3/0/4/130493143/1cac4a4.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_off00007c11.bin
70b1cfc87600ead41c6baafbabf849b59c9736ed827c78a36aa332ab417396ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C11 9776 bytes

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