Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e0a5bceb3e3309…

MALICIOUS

PDF

36.0 KB Created: 2020-04-06 07:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 04dd037a7be50dc2143dbb75cbe739d8 SHA-1: 7cc3c4d004d87aa8cdb9cde0a3a7829d5fbcdcec SHA-256: 02e0a5bceb3e3309078b13563aa36993d449f4948345c58d28ce7cabc6b099a0
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. While no scripts were directly extracted, the PDF structure and the sheer volume of external links strongly suggest a malicious intent to redirect users to potentially harmful content.

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://justclocks.org/uploads/1/3/1/4/131483245/131483245.html#ensanut+2018+resultados
    • http://withfriendsinmind.com/uploads/1/3/0/4/130477048/rixupowudutitijiz.pdf
    • http://lunaspress.com/uploads/1/3/0/2/130291662/sugir-rojitibi.pdf
    • http://rosendalewines.com/uploads/1/3/0/7/130775259/gojavafivosabedonub.pdf
    • http://jacksondavisillustration.com/uploads/1/3/0/2/130272396/foguxalime_xazikovez.pdf
    • http://packsofwolves.com/uploads/1/3/0/4/130490776/kijibadofedujug_kasisobamifit_disorutu_kewijajosajo.pdf
    • http://mytorchdata.com/uploads/1/3/0/4/130477048/jejuf_lodabazul_jewunemuz.pdf
    • http://noah-alexander.com/uploads/1/3/0/3/130323774/zijusuguxibufe.pdf
    • http://odtopografia.com/uploads/1/3/0/9/130969114/1400519.pdf
    • http://vermontaccidentlaw.net/uploads/1/3/0/3/130323593/kalivutel.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_off000063cf.bin
ac0f2ec428a0346ac101da1e8b45ddd4ab57423b39b36d894595a4055bb7a3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 8348 bytes

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