Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da2547254fe34f2…

MALICIOUS

PDF

84.1 KB Created: 2021-07-02 11:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a219715f701c58ef731317c4e8abd37b SHA-1: d1a5b6852b43ec26a72f46995f616e10b3c8d84f SHA-256: 2da2547254fe34f2d0b3bf0583adf97029a91a4dcea20b6bfdd13269c58f6679
156 Risk Score

Malware Insights

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

The file is a PDF containing a link farm hosted on multiple compromised WordPress sites, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to potentially malicious content, and the document's structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/701f23e7deb2ac4bbaf296c801217086/sunixarasazerijulukevut.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd81eb491a---99303560411.pdf
    • http://krevue.cz/UserFiles/File/lixukipapopanafivevagi.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4e7bdcbc5eded2ce869bdfa93a9afb08/56619631318.pdf
    • http://franzoesischebulldoggen.eu/userfiles/file/52554029056.pdf
    • http://assushop.com/userfiles/assushop.com/file/8039151358.pdf
    • https://nnkcreations.com/userfiles/file/rovomoviboxexorepofa.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/009cd9e73cb071786e63f2b59055c15a/rajavolezivosaki.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160972c0fd630a---10407097977.pdf
    • http://shinies.ru/img/lib/file/61758276910.pdf
    • https://psg66.ru/admin/ckfinder/userfiles/files/fusozejerupozeburag.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607657f7e3cfb---1241269939.pdf
    • https://ludifrance.fr/userfiles/file/3908825390.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b38a3bb165f---vufub.pdf
    • http://dragonera.cn/admin/userfiles/file/21038395985.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160741eb33d050---73338528169.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160866afb200f8---9698216806.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e934b756---jogopitatagutinux.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/11258283791.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc0721409a---nevasegamu.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ac1ad214f---gazuputowiz.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6tksq0grrg5vnjt9690uq9gk7f/35189889419.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-5-3/20210503080346312819.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sql+select+statement+from+multiple+tables
    • 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_off0000e478.bin
ecf04d5c699485d1113a838d4d683b9d85373f585b6b47b6871b4b8b5c008fac
pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 17184 bytes
font_01_sfnt_off00011147.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 16792 bytes
font_02_sfnt_off0001295e.bin
861e723654cc6cb3cff107b60c931ba0d6f0d9d58892b1b9ae524290daf3e815
pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 11100 bytes