Malicious PDF — malware analysis report

Static analysis result for SHA-256 04614c1f8bf91ddb…

MALICIOUS

PDF

92.0 KB Created: 2021-07-26 15:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a7ee33dd6b9c1713723c14124ce87965 SHA-1: cbbaed38b7dc5853c6522a457e4c88fbbec5259c SHA-256: 04614c1f8bf91ddbfb6c795afa4ac70e98f1449ce3bdf76c0e3da634344d5d8c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and multiple external URIs pointing to compromised WordPress upload directories, indicating an attempt to host and distribute malicious files. The heuristic firings suggest this PDF is part of a link farm designed to trick users into downloading further malware, likely a phishing or trojan payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/add7a65bd065b137690e321e4e636cf9/46365959495.pdf In PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/tufadokorojog.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a260bb738a8---35487147630.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/robagopowojobapi.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/vogerobujo.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/tanepazuwedogix.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/75688912774.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c233e9730ce---zulilafejewiluripip.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/35100337003.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/8058578505.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/v3dv9vlpbrtdus0n2n5k1i17e9/wobodomipebibomosawi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d961c238fc1---17840852264.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2eccf3c7d---dalin.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/74942413419.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/tusateximu.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/i2akc3ri0erbfbs0q1bthsg1a6/zamegezanilukunojed.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/b7306j9qm0iufl9j5la5l7eek7/lulafuvew.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ko19ud3it0ms0aetsnce8ubd0/bupofilinuzupobi.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/1b2595eb837eee12d9671d3dd437c11f/14444434808.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/c007e5298522aab305108a53d9f4dfd1/vopusiwevelita.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/watigowijotezugegukimajig.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/kivexitutuzudojigeno.pdfIn PDF document text
    • http://dzbnf.com/upload/file///3800596807.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/6f446cd6ec54861ea4cae46c4ed12d97/mawilexubegenofomiveb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=avon+sa+september+2020+brochure+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_off0000fe9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 11276 bytes
SHA-256: 7b67473b6437f70f8d54b08cb690f201a3ab7c65d4e3d3e71a3a933760fc1120
font_01_sfnt_off000118c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D8 17800 bytes
SHA-256: 4f99682068e048b0568df6bb4fcb2ce71e0e96650e32ac58af1d89d3494fab7c

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