Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6dc614f850dbf1…

MALICIOUS

PDF

75.6 KB Created: 2021-06-20 07:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db2e5c1a84730ce93f733c7e312539e3 SHA-1: 4f591e3f3d9cdd1fa594b953bd387ed4bce68cee SHA-256: bd6dc614f850dbf17316c1004471a0fc47ff8a1659bdc8a8f4883e470b594360
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS upload storage and other disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ahxxzx.com/userfiles/202105/file/60993146250.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c87a28e8ad6---40504657385.pdf
    • https://pjkconstruction.ca/images/file/rovofagosuxozoxosut.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/7c7714e3540b2a66565c517f852322c3/nirox.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608170bba2732---wegagifaniveteporijen.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d2ef69dbb---vakasujejobutirigiz.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609c702d19474---bogabesuxuvavetas.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/428d886f82d6a88cb7d04c85aefad091/kokajafadopudalin.pdf
    • https://pypconsultores.mx/userfiles/file/fezalovasodigutozu.pdf
    • http://adabaskimerkezi.com/upload/file/nizoxikamopuziwibajib.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/3v1vms79ee4puc6mmol2ng9nt7/59712185845.pdf
    • http://narcisse.sk/editor_uploads/files/kujozatirasamibuv.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e795a2151---34984013790.pdf
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6/%5C/20216121823122997.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba28f368af9---78263767967.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=a+to+z+tamil+movie+mp3+download
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea21.bin
5b6e4fb1532ca57df019a2a1816c01f89c59dfbb8335a2742e93280f3c228bbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5184 bytes
font_01_sfnt_off0000fbd6.bin
f6f1d33bbf0c2ee79323dbf853101ed1d6043ea8ec54eb2582562563d84e1e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 11144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.