Malicious PDF — malware analysis report

Static analysis result for SHA-256 7424c6403b3267ef…

MALICIOUS

PDF

86.6 KB Created: 2021-09-20 06:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a49fd3ce7350cadcac466e74ddcd4e57 SHA-1: 06cdce81f07179156119126857294d20e17861b6 SHA-256: 7424c6403b3267ef78583a2f4241f9b61cb75a9c51c0a17ab2db252b58dd9d1c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, contributing to the overall attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=50th+law+of+power+pdf PDF link annotation
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614729091d0ea---soduzamujizodabupa.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/femibizadili.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9b60998ba---55443055906.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/tupoba.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/20196388740.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/63811435886.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/54252203869.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e31587708b---71499218451.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/93975601910.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/98743202226.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/jabotagi.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/11466022262.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2cce42953---bugigumixavib.pdfIn PDF document text
    • https://novitas.ro/files/15216152883.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9b1d599a9e4037cd6ac63ed9ee65c0b8/30410793411.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/95769664901.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134efb8c4d1b---98264089230.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/21090316015791600868jucg.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145f3be16eac---92595059862.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/25118098521.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1631550742/file/ridoz.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141eb1f260c1---vobaxefuxoguweresoladizol.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/83955896357.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/zilipoxapovunedelakuzika.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/tugarirafowomup.pdfIn PDF document text
    • 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_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10375 19088 bytes
SHA-256: aba635e0e88fd3b85a7d158fa5132682495f3ed057da107e9f6fe29bc05288c6
font_02_sfnt_off00013483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13483 10476 bytes
SHA-256: 76611841a8732c4b92dd02d1abc6af418ce20d4e6b166caa400e547e1f52a85d