Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e363a36f5784aec…

MALICIOUS

PDF

94.4 KB Created: 2021-07-19 02:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 615ec76a6c23e83d31bab6caacefa012 SHA-1: f6ecb0ae31169d6b6eb8f6abc69ffcf9907e23dc SHA-256: 3e363a36f5784aec810f274483e1f3fe33fd3316342a4d2dbde250ee7d9794ac
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The primary purpose appears to be directing users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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.
  • 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://fertilityupdates.com/userfiles/files/69898823661.pdf In PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608946a93e426---xuxozeroro.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/lidizizulikidivirakom.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bac69b898e9---61504112496.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e487d1237bf---64006992873.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e914ead4298---mefotasodizi.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/33362519880.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/suxizarefofabagivag.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/56661325372.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/wozokafaxezonegifadediwo.pdfIn PDF document text
    • http://proxima-design.cz/files/file/80212001379.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/91541211343.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/1sfkhf1b716p3jm0a6sru5bols/97592325412.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/12907ea01e76a6eb7d2424cc3dd8a0fe/mazuwalofonabupexora.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/nubozo.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/34773779964.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/14a3bc643eeca5fbb116fc16ab19b725/lakowebebonugukaboxi.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90beb08ed4---70240126978.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16075a3c135532---ripunomusurek.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2663704d15---75565388418.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a92eee959b---sopolezujusezodapirudojus.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e388eeb99ec---2897170683.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607a927d86f4f---guloretavemojarisuwe.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6f6c6253d7e0996d6d9b27b63fb7c53/ruwejud.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/911fea47dd9b9cf9fb434ffc68d6d162/duguku.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/a6bcb1b14b7fb1ea7b59c7fedd15b465/87479869120.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/64172374081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=the+movie+in+broad+daylightPDF 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_off00010c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12459 17984 bytes
SHA-256: b0b3c7f61feb845cf8cf4ba28063690c200b1d525601f1b3286c30bc7e632e80
font_02_sfnt_off00015395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15395 10812 bytes
SHA-256: 615749b43d900dfc0cf20df71189b6160e7ce68540027fc6eebefde534623012

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