Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e40042596c72b7…

MALICIOUS

PDF

70.8 KB Created: 2021-09-04 11:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 34698c1c632d31ff6963c609ddded05e SHA-1: cc17c38efb6ab893592828126a73e3a273cf9190 SHA-256: 00e40042596c72b7dc689b71775e863693fd7349a761fd33bc01e90d2ff43ac4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805287817aa---retajapezop.pdf In PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/nefuzizebilaw.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16087ff1499359---poruvinizuboxepu.pdfIn PDF document text
    • http://fxmeat.com/upload/file/24c92431dea77e3c9f65e7ca8c6451a2.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/44957615977.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/zibakew.pdfIn PDF document text
    • https://mmszke.hu/files/file/fegiginefomu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31ece04250---jakemaki.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b2b7601cb09d919ef4d39bc0e8d72031/ketaduf.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/db530de72b6e3b659c819f974be1c904/92268606512.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/70899993232.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/lekujivebegebapeju.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/36269726962.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/23446362007.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709da7c6dc4---84105286953.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/68b989f843e0c3499568586eca405dd3/29060990653.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/91097524377.pdfIn PDF document text
    • http://hybsch.it/upload/file/51075390784.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086f11121cb1---54671404319.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210617141041_rmrlzf.pdfIn PDF document text
    • http://proxima-design.cz/files/file/kokizukolotigotumit.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/84806139259.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/45569693803.pdfIn PDF document text
    • http://ktcz.eu/files/files/satisosevoragiwip.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/wuguvedarab.pdfIn PDF document text
    • http://rts-3.ru/upload/files/72248782369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=coxa+vara+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_off0000b792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB792 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA9 10048 bytes
SHA-256: 09b29338a36f74114e462193411a86fe72b8daabf8d9cd7f9dc4356ef01b092a
font_02_sfnt_off0000e619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 15456 bytes
SHA-256: 51333698d30903debe63fc719a79936deba19247a275f56ee0de53a48f24bbd4

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