Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0995f202076e47a…

MALICIOUS

PDF

88.2 KB Created: 2021-06-26 09:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c32740cbf3ea636d17abdf1cfda8790d SHA-1: 160405fd40b7ccea04083d33ae4fb7afceb25841 SHA-256: a0995f202076e47a18d56f44f12b582bba1d7e55a64dfc2950756d9e79163e31
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The embedded URLs suggest an attempt to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bf11a5143---fovuvanekeroborebak.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d14d6f31d5---11293540664.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/j9rk8b7du9bhius0197vdenunh/71726405721.pdf
    • http://sllight.ru/design/img/upload/file/tiguwesibar.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/b50bsmq7j9rq0akk189d77jjhh/mewagemokuxebemaxi.pdf
    • https://ebooksweb.net/files/file/28753093474.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/2b2f4f7be43d78830a2326dc6b27057b/58001909448.pdf
    • http://chronocertif.com/userfiles/file/71714972959.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/lh53can01277mdtiggdlciefop/vesifuwijixadukulaw.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/352a12e6296a796ff5df60134b04ced3/33409375149.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/344fce2249807bd5be322743d85f4e06/10924010101.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/7ccff907c895e711fe31f00ff47faa75/1328201576.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2e52b7494---54814691039.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608799ace99fd---pogukuzunowalajagufoxa.pdf
    • http://chnli.tw/CKEdit/upload/files/zavesolagupajerejeti.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/e2777b9f66ced28784c547d698c9efdf/60292179996.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/30cbeed6b7297421a9963dee0b87d0bf/netodesedoxeme.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074675c2052c---legofisokiparofefoxib.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc235a8d16---23591975137.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098d4b725499---23587144283.pdf
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56853562262.pdf
    • http://dichvu12h.net/userfiles/file/zixoz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=simple+story+telling+in+english
    • 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_off0000f6f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 16792 bytes
font_01_sfnt_off00010f10.bin
d803aa70b261578853932b7d3248b20c6bcf4089abccf784e6fa8be366b3865e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F10 10728 bytes
font_02_sfnt_off0001276f.bin
e3e83fbc5fd1dc4823e74e5be3098670d927bb4b5d1218aff52995da04d0f9dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1276F 17152 bytes