Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9db0c0c25f1abec…

MALICIOUS

PDF

106.8 KB Created: 2021-07-17 00:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4af26f3822fc2bfdf94403f6780754d3 SHA-1: 04df2955b6e4938f5f3b6e4628d922d18dd6f46d SHA-256: e9db0c0c25f1abec6125f728a2e5b9595434670fe1cc4a0ebc9c298a81e38752
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also functions as a link farm, with numerous URLs pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to obscure the final destination and evade detection. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/d5f613e587df29be23687d1e1c2c2714/95636648298.pdf In PDF document text
    • http://studiolauramoschini.it/userfiles/files/rodelulupupij.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/samulixazasotujopu.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/bozetiroxowafaz.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/digivufuk.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/17584067718.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a70373ea51b---57350091124.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/8b7133b5bf30d21f253922fd9f7eb709/fefamulolin.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ee4247d99---difaditivovanawedetu.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/e478d135fe8508bda166e20e761e4179/dorebepupozarafimevinadim.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/tazelivurudubufoxum.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c052b3bbf---65731938231.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/47291362520.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94277426e---robijetitepugedexere.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/8629472316.pdfIn PDF document text
    • http://phillipsbricksalumni.com/clients/56168/File/26327829109.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9078daaadf---vumozefenesuderisokof.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa1df1fb1---tiror.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/26048047368.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/63ab7907a9ca199ab2cbd6121804ecbf/84430743244.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/nuxituzafuwofefoxesuzavaw.pdfIn PDF document text
    • https://webmenuplus.com/images/file/wasivosimadawasuvupata.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085780a2e3ac---mepulumogawigiwiwiru.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/bijuvefiwovojukesiwan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=capricious+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00017765.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17765 20844 bytes
SHA-256: b51e710dadd16e0337adf6bda43467d1f964f6b7a69f01f588b789daedc06c1a
font_00_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 4512 bytes
SHA-256: dd3031f4f5fba875a8c28b0549c5d3a059719489130ff5ed7f922571da5d198f
font_01_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11964 29412 bytes
SHA-256: a25d4c128262a59390e3dd22287a30465e8d99cbd654a4aa1059226f60803a4c
font_03_sfnt_off00015e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E93 10852 bytes
SHA-256: b4e8eb7194415dd75d808539cd0d88d206e4647ccc25fe2845c7ab42f98a8046

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