Malicious PDF — malware analysis report

Static analysis result for SHA-256 30783ec3767f4697…

MALICIOUS

PDF

79.4 KB Created: 2021-09-04 01:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 09bc7e5a53bcde839713c238f9fde7c4 SHA-1: d0d7d57ec05db5445e7ab51748976faafdefec18 SHA-256: 30783ec3767f46977bb5911fb09b43849033c28ef2fa6a9d105057714238097e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or initiating malicious actions within PDF documents. It also features numerous links, several of which point to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://agroadvanced.com/app/webroot/newsletters/editor/files/76576693409.pdf In PDF document text
    • http://vimar.ua/userfiles/files/70733398575.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16088a204f27ea---domojaxoxukigaw.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a0fdb7b0---34165767165.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/wojowegiwati.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160af4464374fb---kejoketamajalefadonoxi.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089fc9cda186---kuzivorazuwi.pdfIn PDF document text
    • https://service-panev.com/userfiles/zimubifetixutinutezari.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/58619181277.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/33865385292.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6ets8ma4psmp45bigll5idussn/fateruzosakedul.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/sumariminanogawuz.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/71083957072.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210803172449219.pdfIn PDF document text
    • http://ruresept.ru/files/file/vozupaludujerudera.pdfIn PDF document text
    • http://packturf.fr/files/podak.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/4bbf6a58097d58755913e8709e8377c1/bisijezefuseposepajoku.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/499119713.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/taweramigir.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/pukotarejinafakozasojozi.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d91faa384848df941a3e41fafdb0fdc4/78199298489.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745a4e2d995---68013166768.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/16536886565.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/50038109183.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/lufelodufa.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/92648824748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=multifactor+model+pdfPDF 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_off0000d0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F8 10604 bytes
SHA-256: cbd0e006f6d85d7e65ccfca39c9a1df362aa2ce938996df1cc0070f4dbfd4670
font_01_sfnt_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 17752 bytes
SHA-256: 5d3f8eecf030c258b574c7a1d10e2bd1a24c8112eb7168f9811d8c7542700940
font_02_sfnt_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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