Malicious PDF — malware analysis report

Static analysis result for SHA-256 26534a8b2f9d362f…

MALICIOUS

PDF

36.4 KB Created: 2020-04-04 12:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d2fad982ad4111a914a103eab58f93ca SHA-1: 354d0893a37ca8066981b222e8d9944ee290dd42 SHA-256: 26534a8b2f9d362f69899de232d614b9e0245a555f4cac0dce7b5d0c88eabaaf
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 External Remote Services T1204 User Execution

The PDF contains a large number of embedded external links, identified as a PDF link farm. The primary heuristic indicates a mass of external PDF links, with a dominant host of mina520.com. The ML classifier strongly supports the malicious verdict. The document body contains text related to 'Transylvania 6-5000 theme song' and authoring application details, but the core malicious activity appears to be the distribution of numerous external PDF files.

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://michaelhiggins.ie/uploads/1/3/0/9/130969841/130969841.html#transylvania+6-5000+theme+song
    • http://mina520.com/uploads/1/3/0/2/130289354/garazijafat-telubi.pdf
    • http://beaumontlandclearing.com/uploads/1/3/0/2/130270904/suzuxutapam.pdf
    • http://tessa-clarke.com/uploads/1/3/0/5/130551727/xopak-letuzaxexu.pdf
    • http://shopsnootyowl.com/uploads/1/3/0/7/130776791/raguzebo.pdf
    • http://santarosalandscaping.org/uploads/1/3/0/6/130604179/4436702.pdf
    • http://wwwcustomsclearanceksa.com/uploads/1/3/0/7/130739006/zokiteju.pdf
    • http://rlx.space/uploads/1/3/1/3/131384260/3701234.pdf
    • http://apulumconsllc.com/uploads/1/3/0/3/130313180/f4fd3.pdf
    • http://spooktacularevents.com/uploads/1/3/0/5/130590096/gutixaxitinoted-fiwovutef.pdf
    • http://suppliesmn.com/uploads/1/3/0/5/130539091/nomap.pdf
    • http://loving-v-virginia.com/uploads/1/3/0/4/130476024/lipur-lenolapoxebuwu.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_off000066d5.bin
5428300962118f3b9f7cb87cde3ecafbd46b1d23721c5b8ec3429471c41ab4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 7892 bytes

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