Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a49ad711d04ee4…

MALICIOUS

PDF

88.0 KB Created: 2021-09-05 22:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a0f32ac2d77e7ed1a5412ada2988b72 SHA-1: 456cbabb8bc6ca3e848d8e21efbd682282e7bd17 SHA-256: 48a49ad711d04ee47f88c3a32266ea808da263989bc3fd28d6c3b1cea6332b2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607591f703167---22084801255.pdf In PDF document text
    • https://activepymes.com/pub/file/61954379866.pdfIn PDF document text
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/vanivit.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/87710032777.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/31398227620.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/39843735009.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073981660d46---77772914692.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ahmnflmugc652f63pkllaeolsv/91552537811.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/92557042458.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/magoma.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/rijozamujexadowevax.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/f236b47e802354d11923d59afabbc7c1/xasute.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/33b426ea42d3993d35d028efece93f2d/22644949384.pdfIn PDF document text
    • http://shesob.com/file/files/7748577527.pdfIn PDF document text
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/wunesiwagovorodabefomo.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/79243941015.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160766dac20ce6---vutalojamexikogapibebuwo.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/5541d32c15805ac6c73d7afacbaa67e7/21943890169.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/56036594855.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d83ec746a8---fonatijiroxezarugojesu.pdfIn PDF document text
    • http://firegallery.ru/img/upload/powuturunofawefamitikusaf.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/gidanid.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210716103218_zowr0n.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/cddf0e89a614f393f7e9774a7108e219/jaraxuvige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=breville+coffee+grinder+bcg800xl+manualPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/46944151397.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 17724 bytes
SHA-256: 4f5a6e30b64463ef46e9966009b719015c2d57c87df28acf47b82fa736115090
font_01_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F10 13916 bytes
SHA-256: 5cc9ed6fe7c4ead9a389f0117940a9d7440c1606df222dec7e40b3f1ac2037e7

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