Malicious PDF — malware analysis report

Static analysis result for SHA-256 129536f5e749df4e…

MALICIOUS

PDF

46.6 KB Created: 2020-06-12 19:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e568188ac28fc0829dcd9662173c350 SHA-1: bf6e0450e98c249659a69940572e8e8c8b6ab3e0 SHA-256: 129536f5e749df4e10e596617207e37cd8b697842686a50b0b89c7b6ecc479fe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness.

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://swisscarrierbags.ch/uploads/1/3/0/3/130379673/130379673.html#ali+%25C5%259Feriati+kitaplar%25C4%25B1
    • http://mail.quaidconsultancy.com/uploads/1/3/1/3/131398423/8ee745fea29767.pdf
    • http://realvipbooks.com/uploads/1/3/0/2/130270914/7974185.pdf
    • http://mta-sts.mx.dinahsdreams.com/uploads/1/3/0/6/130604848/gofex-xufofavidamu-pavuravobita.pdf
    • http://rxstretchtherapy.com/uploads/1/3/0/7/130740199/5097078.pdf
    • http://mogthereal.com/uploads/1/3/0/7/130775295/forironivedi-junenatinitubur.pdf
    • http://ssrap.net/uploads/1/3/0/6/130604203/3d678.pdf
    • http://yoga.cherryjeffs.com/uploads/1/3/1/4/131437130/zimel.pdf
    • http://idtalentagency.com/uploads/1/3/1/3/131380305/wuxipur_pijavonogutonom.pdf
    • http://craftyourvoice.com/uploads/1/3/1/3/131384484/3300333.pdf
    • http://madisonandleigh.com/uploads/1/3/0/8/130814225/lobawel_fufejanubara_fililapiriwo.pdf
    • http://preview.paragonautotransport.com/uploads/1/3/1/6/131606321/8209564.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fisimixaje.files.wordpress.com/2020/06/rukudojakijom.pdf
    • https://nofofulirom.files.wordpress.com/2020/06/gavelokuxufebunepujaxum.pdf
    • https://pevewedawisu.files.wordpress.com/2020/06/24725957805.pdf
    • https://nevojepib.files.wordpress.com/2020/06/29185537068.pdf
    • https://mafegazavete460328079.files.wordpress.com/2020/06/wasoxajitofomifij.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4f.bin
2a3ac1294a65b8b5e094c7ef998b35a79c4390c52e2cabe485a8f5cd7754e4a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 13028 bytes
font_01_sfnt_off000094db.bin
d6e17cfe65b0881f08bd1a3922f5929619e0b6bdf7073d7e878f591b01c0f627
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 16988 bytes