Malicious PDF — malware analysis report

Static analysis result for SHA-256 d692f8fe8b22574e…

MALICIOUS

PDF

45.1 KB Created: 2020-06-08 06:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dddc0551e4b93912cfab4b3b21fd612 SHA-1: 76fc2c7ae18b5b6ba50420cd2f725e0665c42944 SHA-256: d692f8fe8b22574ed794f2d5f3ebc0c1ec1ee6359a1a7e9158bed1075c8ba3b4
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to seemingly generated PDF files on various domains. This behavior is characteristic of SEO spam or a link farm designed to manipulate search engine rankings or redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://scottgpo.com/uploads/1/3/0/4/130476288/130476288.html#bo%25C5%259F+karne+doldurma
    • http://clutchesbypat.com/uploads/1/3/0/2/130289443/jexiwuxajuk_zekojituzul_matuladomesi.pdf
    • http://mail.bmhc.net/uploads/1/3/1/4/131407010/ea1a5eccfa.pdf
    • http://mail.psygnyc.com/uploads/1/3/0/3/130313634/2032472.pdf
    • http://hostmaster.aughergaa.com/uploads/1/3/0/2/130289583/wukib_junor_berezikujofi_gajoxefanuga.pdf
    • http://quirk.solutions/uploads/1/3/0/6/130604905/jigorud.pdf
    • http://essayguruasia.com/uploads/1/3/0/6/130621870/mapamomop_fezibiragax.pdf
    • http://hostmaster.mygreektragedy.com/uploads/1/3/0/5/130590186/2c73b0306.pdf
    • http://environeuro.com/uploads/1/3/0/5/130588913/67468cc2.pdf
    • http://agghog.com/uploads/1/3/0/3/130313359/39aeed2ff.pdf
    • http://mail.bmhc.net/uplo
    • https://zikujizexoj.files.wordpress.com/2020/06/lowolaxar.pdf
    • https://rufutusizuk.files.wordpress.com/2020/06/wusaxuwedefazotibi.pdf
    • https://vafosanego.files.wordpress.com/2020/06/9718147659.pdf
    • https://sekejodi.files.wordpress.com/2020/06/zalaxofelifebedetabi.pdf
    • https://dopisusisiga.files.wordpress.com/2020/06/31639814185.pdf
    • https://zugolenod71541088.files.wordpress.com/2020/06/23382668214.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_off000081d5.bin
6b925d217f6eada78a14fd8a7d339d73bf46d66772cd2553aad8bd3039a42879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D5 12000 bytes

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