Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dcfecdc7f7336a…

MALICIOUS

PDF

54.8 KB Created: 2020-05-18 15:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4114db1d049350f96b39feabf10bf8d5 SHA-1: 30657f308118b7eceabc0b8d9847147f6418827c SHA-256: 14dcfecdc7f7336aedbcb637db10f80d3804c5cf7b7f6f44963ca61074a096ac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The embedded URLs, such as http://corinneweiss.com/uploads/1/3/0/2/130287866/130287866.html#barbie+starlight+adventure+full+movi, are likely used to host or redirect to malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://corinneweiss.com/uploads/1/3/0/2/130287866/130287866.html#barbie+starlight+adventure+full+movi
    • http://aedutah.com/uploads/1/3/1/4/131437865/gogiwipi-sazetubodal.pdf
    • http://listeningplacespiritualcenter.org/uploads/1/3/0/7/130776553/siligitegutoj.pdf
    • http://alwaysondutyhomewatch.com/uploads/1/3/0/2/130270955/pilokutonazen_gomovonomepolu.pdf
    • http://kingdomcomeinternational.com/uploads/1/3/1/8/131858044/474023.pdf
    • http://viiasaunas.com/uploads/1/3/1/3/131383770/refujelis-lemadirakitaro.pdf
    • http://ttfurnishing.com/uploads/1/3/1/4/131483371/b59e0bf18836.pdf
    • http://colpidisole.net/uploads/1/3/0/7/130776025/42cf10151db.pdf
    • http://clicknimage.com/uploads/1/3/0/5/130588809/mokij.pdf
    • http://sonatsecurityincorporated.com/uploads/1/3/1/3/131398142/vagopidofir.pdf
    • http://nysbraf.com/uploads/1/3/0/9/130969831/341426.pdf
    • http://loveandliveabundantly.com/uploads/1/3/1/4/131453494/pagogatoxiredofejil.pdf
    • http://saffleplantfarm.com/uploads/1/3/0/5/130543600/420905.pdf
    • http://theagfix.com/uploads/1/3/1/4/131453049/berosubob.pdf
    • http://animosante.net/uploads/1/3/1/6/131637021/mixazorub-nokosodured-virure.pdf
    • http://smartstarthomeinspections.com/uploads/1/3/1/4/131453577/podizazubale_zikaxuvefudi_defiwipabuwis_dotox.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007af4.bin
3318131725367468e8e7b889c9669e3fda30336015f9035d5b0299b6f2843c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF4 4144 bytes
font_01_sfnt_off00008a71.bin
6d2314f179adc1b0c742441118114e29c13a326be270ceb0ede9794286aa5483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A71 12516 bytes
font_02_sfnt_off0000b3d3.bin
b49cc49d449e30e8839a2f3d0a1903905c8706b3ed8dac44cda81818fe760170		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 17780 bytes

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