Malicious PDF — malware analysis report

Static analysis result for SHA-256 6693b8d6b2ce8aeb…

MALICIOUS

PDF

91.5 KB Created: 2021-07-27 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a95fbc10e983f6fe1a20fc5c9c2cf471 SHA-1: 6397c88d18c893cf9d352b951ccee0cf0b86d216 SHA-256: 6693b8d6b2ce8aebdb198a98eda530afb0b616e753cee931bfaacb0942b2bf95
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm or dropper. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses urgent language to prompt user interaction, which is consistent with phishing or scam attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb48fb10bde---38765386773.pdf In PDF document text
    • http://abpaluso.com/upload/file/wojixonosor.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/19776260101.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/856f37552af23011a0f0e6214b22b88f/xolobuwebuxevovowevivir.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/bnbthoqgq3ldbu8a9572eild33/26449803889.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/pujanenidewinatap.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3b96642e8---52572462986.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/vivujusimevomepagojapije.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/51347903145.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/53b55ea913d1494191642b43a03c5f86/91636023822.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/xugitiz.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/eae93a56213da8ff1e4d46651becd3d5/kobava.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/bekasudegux.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/buxetejubeferidepa.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16081b2bd90f74---vapumipap.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160715bdae9a36---37839488826.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843077c1c6c---bumeliwekipilikej.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vi2288n137ka8cr667jtamqo55/buwomitisewonusomonar.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/tazoliluluwusunogajamuneb.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/41025098781.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ce9074c82---dujakilanubu.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/48arb2up9slil19f5ilh8kvv34/22933758812.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb22bb25a---395486821.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/lojalimepas.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/xulikosawofenebirisolivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=warning+letter+for+negligence+of+duty+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_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB8 16652 bytes
SHA-256: aff4e18eae26adcd226b21c688de2aa7b843b9e32ff28691dc7b0ad58d06905f
font_02_sfnt_off000146ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AE 10836 bytes
SHA-256: 78147c898d48bfb7e56f920ee545d95a9851be19801f8ebe9a9720e833b4648c