Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eda0d15dc1c17bd…

MALICIOUS

PDF

36.3 KB Created: 2020-06-05 17:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3471ea031b6490e6948bc785f99092a SHA-1: bd21c527f4891c855f8f99a80ccec21d2e95a56a SHA-256: 3eda0d15dc1c17bdda05fd22011c31add17950997489d85d5f3fb341b70f0bf8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used to create link farms for SEO manipulation or to host malicious content. The ML classifier strongly indicated maliciousness. The embedded document body text, though partially corrupted, contains phrases like 'I want to download cliffs of freedom' and lists numerous URLs, suggesting a lure to download further content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://summersapp.com/uploads/1/3/0/2/130274169/130274169.html#i+want+to+download+cliffs+of+freedom
    • http://dropscript.co/uploads/1/3/1/4/131483249/0dc339255.pdf
    • http://mail.orgransenzaglutine.it/uploads/1/3/0/4/130476687/9874eb6a71c9.pdf
    • http://annajolly.com/uploads/1/3/1/6/131606202/xakijivosaror.pdf
    • http://kingartsy.com/uploads/1/3/1/3/131382693/weper.pdf
    • http://arlingtonphilharmonic.info/uploads/1/3/0/7/130775803/2b6c64e5328e50.pdf
    • http://hostmaster.wiltshirewebsitedesign.co.uk/uploads/1/3/0/6/130605421/f375b5e1d.pdf
    • http://mta-sts.kileyfasano.com/uploads/1/3/0/6/130639605/a3c75dab043ae6.pdf
    • http://timelessfinds.net/uploads/1/3/0/4/130478374/zobamuteliwed-zafedejipomir-pifixutuwugaj.pdf
    • http://summersapp.com/uploads/1/3/0/2/130274169/terms.html
    • http://summersapp.com/uploads/1/3/0/2/130274169/dmca.html
    • http://summersapp.com/uploads/1/3/0/2/130274169/policy.html
    • https://maforebe.files.wordpress.com/2020/06/21524682348.pdf
    • https://zubijunemovo.files.wordpress.com/2020/06/wumalixaluna.pdf
    • https://xolupola.files.wordpress.com/2020/06/73002536592.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_off000061a6.bin
1d7943b24c42fa7da9b6c8de96f4640f3f62ba37fc0575d363e82a02c276dd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 10536 bytes

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