Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba228678d002b7e…

MALICIOUS

PDF

112.1 KB Created: 2021-07-03 06:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a94fb277c4733231a6c671d8a1918759 SHA-1: c4290fcc414f3c988af368c11cadc4e7e0586b1a SHA-256: eba228678d002b7e4b095d9ab36539771894c73a310b847555170eb360859275
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure victims, likely through spearphishing, to external resources for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/ffbd545bb0c7c70e3b6a24bc175c7d22/52881141370.pdf In PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983754b6810---51140540396.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/zaziwuna.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c11daa82de8---noreribirewolu.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/loxemolukijawelevujunosov.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/xekokojegiminofuro.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/rq75sipvajt50crso45tkpaepk/ruwivusonelawasekazile.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/zikotugakub.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/u5ajmd3849n56tjv03gjhd4j86/wikimo.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b57d08ef77---95756215911.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fe54dd9dc---gibununonebul.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/9tbd9ji8kqgbhhou7ubm4a3lu3/65072153335.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4a9f1693c---pebupewilezezu.pdfIn PDF document text
    • https://netpage.info/userfiles/file/jimitepijojikitabo.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/84040979543.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8f847bbdf---61981574823.pdfIn PDF document text
    • http://skncn.com/u/files/zujobuwiv.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89147700058.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a34bae6dcc1---xetumewamo.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/420f0758930da14d166ed47180615db1/59167323416.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/linaxiwi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c01db168120---94037769363.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/53755958325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=pre+mid+and+post+tribulationPDF 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_off000153c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDB 18084 bytes
SHA-256: 54770b5d0decab747736687db39c7d2b95bb999fa594d834860a94d6f7763441
font_02_sfnt_off00019aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AAA 10792 bytes
SHA-256: 8e2298f1c747dddb9efa61417a01201e986c459c8e895864a5dca6f739ed82ad

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