Malicious PDF — malware analysis report

Static analysis result for SHA-256 b437f6c2f3a2d700…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 11:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 344eba974f84002a46d354dd412f747b SHA-1: 2aee570f85bd4bb3ad6e259a2d3fe118e6306247 SHA-256: b437f6c2f3a2d7008b68e09edb8184ff924c4b20da13a292ad1d87943c67d144
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45bf82a1dd---binulipizapofovoxogoxanu.pdf In PDF document text
    • http://visit-pune.com/userfiles/file/botujuxikesefesiwopitote.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/88958752249.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/mujapagefa.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/53389301549.pdfIn PDF document text
    • https://bem-sa.com/img/file/62297911464.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5be0985482---daferejinijetudemizilo.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da41651ac5---poletazujedujudokedajizi.pdfIn PDF document text
    • http://myredm.ru/uploads/file/lebup.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ac0259c1c35cbf4ff738252a9ee68390/fijifogid.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/o5gco124vpqr09vuag1bqpud9r/kunujebup.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abec744c4a---vuwemena.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e39c9b7fd4---89128939615.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6b22115ac1e5bee77e98d09aa736b856/weratasonibomib.pdfIn PDF document text
    • https://people11people.gr/uploads/File/pedipeta.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34bb35e75---75027316789.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/belivitegabekejod.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/1ejuaseffh3688442qsftean6n/41389247503.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/87659876281.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/mimitavoxoxoluzimezipozok.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e415f51014---pitolowomised.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/28084012290.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085910dc3f79---xikes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=good+morning+short+text+for+himPDF 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_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 16780 bytes
SHA-256: 60065d4022d245d7c4de9a254e5b4eb35df265099e28e17a994712d8158f404a
font_01_sfnt_off00011e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6B 10736 bytes
SHA-256: 67f0c2f84ffb24b5d0177f4fa6a14ae3767212a4084a1d0b345d3d5687331188
font_02_sfnt_off000136b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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