Malicious PDF — malware analysis report

Static analysis result for SHA-256 e132d76ea6d5c1c9…

MALICIOUS

PDF

81.4 KB Created: 2021-07-29 17:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80aba12414b255f2a8a7aefb95d54958 SHA-1: 6f9f86749d9aee6d27e18066e63e2c91ba7c7f94 SHA-256: e132d76ea6d5c1c94558e44f55f06690d6c448ffb33fff26f9a2d317f09bcb87
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to other PDF files hosted on various domains, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a link farm suggests an attempt to manipulate search engine results or distribute payloads through a chain of documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/savawuzezutagiwuz.pdf In PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/3936293452.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bee0686dc---nuruzewebijelimoku.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d59d231baf3---71731578674.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/13556a709f8653e5d5e89772dc6a9453/tezevimugefujaxuj.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/sosetabeviwijazenudub.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/noxogobozibatij.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/giwut.pdfIn PDF document text
    • http://ikoi-es.club/yamituki-n/uploads/files/munovebo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/tebipu.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/89623373502.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff21446683---46308398956.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/55247425593.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c079d6144d---91427975721.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/94821913807.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/rebawizidekugesemugufebol.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/0fv9fgg45t65ap1l7opj8gbu9v/90816020325.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086d64ba672f---28224165708.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6d6440f90426364588288d3b592b7d79/wefopurexa.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/29083651522.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609650394aeaa---65440115574.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/tuxukubifoneki.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945334c63ac---tepenalidudegeziv.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/6427e4d4d4815bf09e67fb29b015c3f6/zatenufadujugamakejifowu.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/cd8b9e07ee2291882cff1ebb6f220884/kedigu.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210517183409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=zombie+hunter+king+mod+apk+unlimited+gemsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 17004 bytes
SHA-256: d61e95ab35761aa20de8c419c750e23c7a370fa2c7c96a00291391733a87d1a3
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCA 11136 bytes
SHA-256: 37b932af089764828d844bb971462f1bda6b0bc0efecafed3a14132bc45c14c2

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