Malicious PDF — malware analysis report

Static analysis result for SHA-256 450ea82f4f1ff4dd…

MALICIOUS

PDF

72.9 KB Created: 2021-09-03 02:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 511cb3ae074e6311855091cf6d7a9cfe SHA-1: c77b8f94f06243e016e589a8cbfae0d11cd6062b SHA-256: 450ea82f4f1ff4dd990e3c14d7dbaecb237fb37d0c18dc84aaa41489aaa23ea7
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to phishing or malware-hosting sites, as suggested by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee13714ed57---birifufexutijo.pdf In PDF document text
    • http://studio-rivetti.it/userfiles/files/pudasukenelarukijemalul.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bd4a32f34---rimutukat.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16127265019652---veluwofap.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/51006717254.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ada16e4485c---jejozunabur.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad7ba3f244---zukojuxemed.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/zoxarafipezomenerubirege.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/xovebajidewarobutupedit.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/97141172362.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c986aa187e---53128466187.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/2r8j80jt52f96h7t495fs3cgjh/nebuduvuxezozexi.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/jiligawadapatiji.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c38acd9003---nofubituterofurafusipov.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/99538776336.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/89439127474.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdb40af7bf---68107929679.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160966cd4bb19c---55488548718.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/dokereduvuwanirumokeminaj.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/legixijebizodenujofo.pdfIn PDF document text
    • http://inphilong.com/upload/files/65565187638.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/43387264262.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611830e3b786c---goxabizaxobolumixisor.pdfIn PDF document text
    • http://zatacorp.com/upload/files/morumotezisonenin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=arrancame+la+vida+pdf+libro+gratisPDF 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_off0000ba3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD255 11152 bytes
SHA-256: b430a75c0cc068a43c6e02d218520a7baafc1f07dc0dd95f915a47c431a9d23a
font_02_sfnt_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 16680 bytes
SHA-256: 8ffcef3bf4ad023ff4c14bbdfd2d82889efd6e7603941179ac42a7917c9966ea

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