Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8ad22f969735f5…

MALICIOUS

PDF

99.1 KB Created: 2021-07-10 11:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07d08103e3d3d792555485e7c38b8c4b SHA-1: f9e02181dfef40a4ecdefea1f74656168ca03c3d SHA-256: 9d8ad22f969735f53d126c38650e425a8548d3dda8b6e2a80c0e6e7cd0b26ed3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads. The primary purpose seems to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53501568321.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c97049cc6cb---95044979715.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160841d597e432---jelik.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/80867d4a07e357e896eb14a6e89f8f72/20558812302.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/o23mgfkjoo5rmlauh9olg9e4kh/xikigesolopamumen.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094422529c1a---98741237031.pdf
    • http://tuclubcr.com/campannas/file/73279357492.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ce9e93138173cf4a87af10ffedd2ac1e/81322733375.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-7-4/20210704192941800664.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160727fe52e2ec---97292156714.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077501052573---jugalozasiduposorebow.pdf
    • https://global-brand.net/userfiles/files/9197246860.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a447fd2501e---vosuximanoxosivoju.pdf
    • http://glotecgh.com/upload/editor/file/87947558918.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/349fc3d66ff3016a810fe77417acbe49/natadejarafovozulelanak.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f38718e59a---46366732791.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/7fdd543ed1a7f3f9a70cf2e34cbc30b2/jikobavosodoworoviputoz.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608199efb5255---kugorabudezuze.pdf
    • https://gbagencement.fr/uploads/file/11083181031.pdf
    • http://amexeuro.com/an3_Uploads/file/39219379698.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079db8817ffd---67231590123.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cafe2194cbf---bewekuxunepifiruxasobefa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=robin+evans+translations+from+drawing+to+building+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://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_off00011d48.bin
38b8d46936fbb300795e4af501e17d55c0d1038fbc91eda30d54bb24497177fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D48 17404 bytes
font_01_sfnt_off00014acb.bin
0fa7a809e41047c67aecef1d0318806a4bae1c13a75d7dde8293032aba27a155
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACB 11276 bytes
font_02_sfnt_off000164ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x164ED 16792 bytes