Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f3ff3edf0346e4…

MALICIOUS

PDF

87.5 KB Created: 2021-09-02 09:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d06795dd0a717326c6c842efb3aa7c46 SHA-1: 7cbd121c871bbf1d190d68896e187860de7f9c83 SHA-256: 69f3ff3edf0346e40f5e186a12e8e43908006d4cec80ffb463f6e4ed47518416
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dimesedajufunagel.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc16d2febd.pdfIn PDF document text
    • http://www.toptehnik.si/images/74943843302.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/12446db7d69ac95016e4cf2c8909d371/zetumofawureza.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/kebikamipabutenunamafit.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/86001732168.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/49679457647.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/11922660946.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/1heutsvb9riodevjehdeqq5qp6/51900822351.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/vavixekemanativuweg.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/lisuxitutozixukire.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/23312628898.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/8976221191.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/feauebh6an1n7d5hqseq6251p5/genotewuzojejovafevadam.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080bcb42f2a3---48571680387.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd760e5156---92162498462.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ilmq8ghgso1hn9nhjdg5hs5us2/89843776488.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/39688762600.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/79155265951.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/31662344431.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8090d3bae---33411585906.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/2054t1e7q09o2bfk1gda57e5av/sawowixarorutegapobawefer.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/6aba4135cf9619f768ac6de132016347/vitasureragemazex.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/83653950199.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/kusesulol.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/1762625885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pothos+cuttings+in+waterPDF 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_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001083c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083C 10652 bytes
SHA-256: b2d9dfcf8870b2ad889b51ba5bcd0ea0eb3bbe11514b67713153b79de80638f7
font_02_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 18536 bytes
SHA-256: 541a86141cf8bb970bf0030a9952b44d926c34695b6774e1523a07fc87561a13