Malicious PDF — malware analysis report

Static analysis result for SHA-256 765fb211e1923e15…

MALICIOUS

PDF

85.6 KB Created: 2021-07-04 03:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86d3423d478f05bdc6cb2eea01f6ad33 SHA-1: be99f631123d44f6a391de44e1d11d0e95a416c5 SHA-256: 765fb211e1923e1503b2a182b65767fae65ff5bb3726a9b3614e192c82005615
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/mp0da4vket7h2q4jauvfmpi0t6/4842683170.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773c61eb52a---97533306872.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2b81f23de---44615030279.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160769a0ba4e42---62478471105.pdf
    • http://akifkasaboglu.com/esatfisek/images_upload/files/86157489902.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5fb2fa776ee32d1886ac9f4d7a35b503/29367837905.pdf
    • http://deckdreams.com/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/raledudiza.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/lklpjfpe0r4469d5cp6ao2eqsj/pumojonusap.pdf
    • http://wisdomtours.net/upload/file/zabenapado.pdf
    • http://gps-tw.com/CKEdit/upload/files/7585873746.pdf
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/wetizevajate.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1eaaf1068---bijozalabuniv.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb44052495---44193698971.pdf
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/48969607707.pdf
    • https://ancoraeducacion.com/images/84910227361.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1668e10a58---turinumowukunivujuxajug.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc59b4146ef---pidexiramufuzepij.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/79a5f23a584c3867a99634b945116d16/32968785506.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/7e86250a9041dea6114f36bc600f0679/13644836863.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a6e913d17ac1df91d2092d371a6a2308/fexabapakipikavug.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/b29c28f10b40c0c5399aaffc606bf4e2/norulatizisuluw.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ip4bnaa3r1oa71m0v92epu9912/38528965316.pdf
    • http://haai.org/upload/file/85990849648.pdf
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/pubemijerebelumimapafo.pdf
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/guromapedarolorebubobo.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/l73jh2voqdb8ee0lljmu79ukqb/wasitixodasadewogos.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=can+you+put+sharpness+on+a+trident
    • 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_off0000e9e9.bin
74d0e7d89b2a93540d65866c3bf15238a64f8626bbfe61dfe353709c9cb156bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 17696 bytes
font_01_sfnt_off0001186f.bin
f9990975ecf689aa9a55d9ac6835e91809c82ebdd35230647e7d195e8ec92bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 10688 bytes
font_02_sfnt_off000130f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130F3 16792 bytes