Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc94eb88b7b5f70d…

MALICIOUS

PDF

88.7 KB Created: 2021-07-22 12:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f302015e21862ff0d66537c0367f73f6 SHA-1: e3b71e3d62bbdd63630a2503a28781a521c3a426 SHA-256: dc94eb88b7b5f70da7380343ef2ded014d62bc9ffd6b28b0267c769dc07e0783
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The file contains a link farm pointing to compromised CMS upload storage, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this, indicating an attempt to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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 http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9994aa4d5e---31344385646.pdf In PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/b3ed90dfb6695536baa4e65a5e3bad0b/91330295240.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/38226045955.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/2164371102.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/ronobimovusakuv.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/mefozixebapopu.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/fumawevekezaratil.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096de213d927---11338569241.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075caeb2e1da---78111862410.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/misemunizamurava.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/dolafomalizipefoxutitegev.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3ff242930---wazefotate.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/77455723945.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210628031652.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf1a8053a2---25939261315.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1722640957---roxogijafekudi.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/a467a5da84bc92789ddd7495d336b1bc/lelebogivorukefavasav.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/95688106417.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/6193bbef4d18aaabd10fe3271cea367c/80321182990.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/46889445912.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/57775735646.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/93779f41bb43a6fa2f06e35ae20901a7/55204825143.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=extract+logo+from+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/89f7c8dab6088e386ae436765a32c97f/57892638553.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_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 10552 bytes
SHA-256: 07dd28f44c5ac6fca53eb1f1742351d38538cdb00d5365a660e6457f8a56d3d9
font_01_sfnt_off00010c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12439 18544 bytes
SHA-256: ee9aeeb4947edb57f87149db70e145900d6261715283624d3d58ecc2f6c80dfa

Open this report in the interactive analyzer, or submit your own file for analysis.