Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0aef5250a1c7333…

MALICIOUS

PDF

83.7 KB Created: 2021-06-27 23:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3a30b58511369df754ca6e1e62864c21 SHA-1: dee04d770c91cf179a950cbd370a533edcdbe57a SHA-256: d0aef5250a1c73331231b4a29ac047cce82335eb5a337c010dfcda25078e4033
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but the structure and heuristics confirm the malicious nature.

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://cometsecurity.in/admin/userfiles/file/93433939988.pdf In PDF document text
    • http://matchedtubes.de/userfiles/file/foxaxevozobovakuj.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d40826ecf4df549a9ae35a591478a384/gukowozelunodogi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/brf3al45g9g90sc8l4bn5b1v18/31150211093.pdfIn PDF document text
    • http://arslanemlak.come/file/xifugujulakamijene.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f6067e3cfef6303bfc87d699d593d9a3/68859871319.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7310d3cf00bb737cdaa11654d1c85afb/satedamu.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/80358395629.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/74713769553.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ee76c8fb---xuxowuwafarefi.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/21536272772.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/nuboninizunetobubukavefis.pdfIn PDF document text
    • https://www.leeja.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb7ea6ca1b89fa956bd06591a22ec67a/nagejuwimav.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/n6ttj52m8pbco0c20pgpgfrm72/rowovububureboluweto.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/o8g9olevjiirq1rcn654qneu74/nuxemipemu.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/25325070955.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c12e65f8aa8a339a8d4a29f960e0be84/98470795989.pdfIn PDF document text
    • http://brlairport.com/images/file/10949025743.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/22/vivulefufow.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088815eaeef6---kuwutom.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/33aa6ba410580f643e524901c7533619/29353829534.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/894d07b65821ab321a664add9be2a1bc/sexiv.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160898d47af6ea---8940727182.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6nammv3alqesti6dla7rnbno0e/71504587325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=taxi+on+timePDF 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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 10020 bytes
SHA-256: 98efda923c41b127108d0149486532eb47fb7bf76f392f8b1b9e411714beee50
font_02_sfnt_off00011643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 16684 bytes
SHA-256: d5cf859eb548942bd144a987f9e5a544911d19d5f8dc93ced4ee86b48febd17c