Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce11ffc3be5f8ce…

MALICIOUS

PDF

37.1 KB Created: 2020-05-18 18:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbae46adfcf7ab4a1733ee350df71ce4 SHA-1: 044e040e97fbe82ccd769c32fe5867f7188c8616 SHA-256: 6ce11ffc3be5f8cee4024e213cb004ae39c62fa72dc34369b0b16b523a6192d7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified as a link farm. The ML classifier strongly indicated maliciousness. The embedded URLs are likely intended to direct users to malicious websites or to improve the search engine ranking of attacker-controlled sites.

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://andmerchant.org/uploads/1/3/1/4/131408224/131408224.html#game+of+thrones+altyaz%25C4%25B1+1.+sezon
    • http://jewishschoolchoice.org/uploads/1/3/0/4/130476678/rikerunarin_roponotibido_tabitime_viriwobemeno.pdf
    • http://soycesarbueno.com/uploads/1/3/0/7/130738482/994203ec626a2.pdf
    • http://gillilanddesign.com/uploads/1/3/0/7/130740537/c5080b12a.pdf
    • http://amckinney-properties.com/uploads/1/3/0/5/130588856/04ad17839bf9.pdf
    • http://justhavinghersay.net/uploads/1/3/1/1/131163783/sibidasojide.pdf
    • http://lindenhillslaw.com/uploads/1/3/0/2/130271116/dapiwi-pijeva-tetejukipipusa-towixufit.pdf
    • http://willowcreeksub.com/uploads/1/3/1/3/131383854/5996105.pdf
    • http://pulmanoholdingsllc.com/uploads/1/3/1/8/131857334/mejudotasoxiri-voxemo.pdf
    • http://bumpkinbaby.com/uploads/1/3/0/7/130738805/kotim_temomatuweda.pdf
    • http://nontique.com/uploads/1/3/0/3/130312976/032449f92c.pdf
    • http://walkerlelafoundation.org/uploads/1/3/0/7/130776572/6b0b97f.pdf
    • http://mcivorvet.com/uploads/1/3/1/4/131437017/6053502.pdf
    • http://serviertransformationdigital.com/uploads/1/3/1/8/131856121/sezaxexazaper_bosuwoluf_jofosope.pdf
    • http://memoriesbymimi.net/uploads/1/3/0/7/130776611/3603916.pdf
    • http://elepantry.net/uploads/1/3/0/7/130775907/8975100.pdf
    • http://creativebridge.link/uploads/1/3/0/6/130621675/getuw.pdf
    • http://carolandrich.com/uploads/1/3/1/3/131381259/5344509.pdf
    • http://hillsborough-masjid.org/uploads/1/3/1/3/131382808/zazusoses-bonulasagake-tawijomotobawa-xijapigufug.pdf
    • http://faithhopelovesa.com/uploads/1/3/1/3/131381769/9277454.pdf
    • http://jenngraydonhhc.com/uploads/1/3/0/8/130814976/rojekagoroge_jipumaro.pdf
    • http://pump-culture.com/uploads/1/3/0/6/130620320/f41f82ab3376.pdf
    • http://townshendcs.com/uploads/1/3/1/6/131637137/zuperidu_lowimowizafa_kepixed_worutugel.pdf
    • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006123.bin
9ce9d91c8ca83b05ada5ad4a32fc65637ef36f56538e7414a253e9fcd8833931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 11528 bytes

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