Malicious PDF — malware analysis report

Static analysis result for SHA-256 65488b222d8d2b0b…

MALICIOUS

PDF

82.7 KB Created: 2021-07-06 15:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0299e570a39566b27718923bf6cff27e SHA-1: c63b993f5409ae01a61fc4fea1c7150a5ed84edd SHA-256: 65488b222d8d2b0b0ad1820c44b9abd7857da2f11c5a5b91b4c4d18b9cce11d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's used to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://malabarisproducoes.com/arquivos/files/fofuwo.pdf
    • http://supair-lux.hu/ckfinder/userfiles/files/2677704693.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/447d940980d8bc7bf785b8422593e463/95569543075.pdf
    • http://abpaluso.com/upload/file/3894041639.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160812384ce6f4---fugukefoneletesavufejevi.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/1fc080b596cb91ce441b3e961f7a01de/43742142072.pdf
    • http://beergolfers.com./blog/images/file/duzotozagopazubuv.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d5cae96e23240fb0b74885461cb1b93d/kagegixojapumabupalerox.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071bed7368e3---72809637852.pdf
    • http://meruzhankhachatryan.com/app/webroot/files/file/jifikaw.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/252e542bcf7fade37519e201a987761e/tibakagelifigabonodofizo.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/41990507536.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092722042e26---budipojarajasugukoruxugu.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/4acc2qhnll6g44atrogmuc0ml3/salutenadizimewejar.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160780fb8a6e6e---bunafofunopobabufon.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4dfb1c976---namipug.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8fc62fd73---virixajutuvi.pdf
    • https://lanhcongnghiepthinhphat.com/upload/files/pubuvolad.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d4b76727a---fewugidaranaliwidinogabok.pdf
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/3572665448.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=feet+licking+and+sucking
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e293.bin
a7460c1002bc64781d423bcb34aaf279e2bc1e6eef40fc1ae2441a4388633979
pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 16756 bytes
font_01_sfnt_off00010de7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 16792 bytes
font_02_sfnt_off000125fe.bin
8962e861f010ce2c6f6cfc1866d99e2d50f79c144f08577eb7947409266e458b
pdf-font-stream PDF embedded font (sfnt) at offset 0x125FE 10492 bytes