Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2441abe5aefad76…

MALICIOUS

PDF

79.6 KB Created: 2021-07-15 23:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6d7fd4dffddabd23cb85a565503bd8c5 SHA-1: 51ede7a6703072df9feff06c94b873ed639dd0bf SHA-256: a2441abe5aefad76a42252fffd307b7bf0c431f3a172f981ddac6ba4f3903d2b
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious content. The heuristics indicate a link farm designed to obscure the true destination, likely leading to a further stage of infection. No scripts were extracted from this sample, limiting the ability to determine specific execution methods.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 4

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://naoshima-habitant.com/nezamifadovedixu.pdf In PDF document text
    • http://progetec.org/userfiles/files/37184262678.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/19624004864.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/1772451970.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/31356391569.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094405b8da9c---vefisijalomikadip.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a539f59b245---demutigaweb.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee03460beb4---rakewomex.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091e7743c98b---meminixasenovipuxogulixa.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/87340545960.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/90i4o4rdbpi4bivfn1hlk0g9ve/ziminisenese.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607de1b013747---72529631162.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc95b855c17---34291677594.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/t5hhkrjdfg3ing8pm4fh5snve0/furiwerawibut.pdfIn PDF document text
    • http://alconburyreunion.com/clients/36523/File/41069488203.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/samevejebefujaxutot.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fae1e0705---18786453265.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160798a67e1b00---65417673767.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072f9a113b4e---xubomasawupigesev.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae98b7c92e---33294493902.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/h2201pv9q2k400380d9c65vcfj/vifurerijijiditogunisemos.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dad6058e41---31124980248.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/32783402874.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12f94beef---zojelisinadi.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/tanefaditabozuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=manually+download+windows+updatePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FF 10580 bytes
SHA-256: ce3065fbc72925bdfa1dd54944560ae192f765156e94315a202aba76795601c3