Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eebad33ebd37c5…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 03:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3495fe051b57bb229ff5e51ffc6e2bdf SHA-1: eae9d3fd7ba36c64fe4839d6d31e4ffb04653835 SHA-256: 65eebad33ebd37c5644dd0372f329328f283ed223f02817dec1237842881bd79
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9a6900d00c6e76613b39c1c4a8a72dbc/poxaletiwen.pdf In PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b380fa8f869---38804033565.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/gupuwof.pdfIn PDF document text
    • http://lucann.com/Upload/file/gibefonuxukidoweboda.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/45082169371.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/52138428303.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085727cbe590---10774603337.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa7494fe1---22966190678.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/g7ov9d5svs5eu15msoiqtkdt41/50803271412.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/d3204713e43fea203020fcdd7c464598/bexetezug.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/60b68b6ae3346d30b421c311ee3c9811/gemesirikulil.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/51272645044.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/oavjjsehcmqmlntdap2jls494r/27629933036.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24d3a538c---39506321527.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/pevelotiloj.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/sepororav.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/65129753921.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/28f4169f36123ab8c2143045e32831ae/doxumowojigibonojetajomew.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755e7b3630f---30992597124.pdfIn PDF document text
    • https://avenue102.com/uploads/file/paxegozumos.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609874c553f7d---86159342295.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160827c136a166---27334074473.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/39932224796.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105212024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=higher+ground+lyrics+and+chords+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_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 18268 bytes
SHA-256: 581a09ffcac020be07608da893001a52c1e26acdb5acfdde8b6d92cc04d091dd
font_01_sfnt_off00010a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 11004 bytes
SHA-256: c0b11e543b26bd9b58c06f1802526a7279817f50244b6561764504cc8d30f98e
font_02_sfnt_off000123c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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