Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2933e02bf37e486…

MALICIOUS

PDF

83.5 KB Created: 2021-09-08 09:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47886625c8885db4ed19438162dd27b4 SHA-1: 9894894974f349b0b7b8085b5c2d9ecff7ec085c SHA-256: d2933e02bf37e4863caef783cceae5f87409bfe4d470b603f7e338f61393f437
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number presented in a context of billing, refund, or security issues, consistent with callback phishing or tech-support scams. The presence of numerous links to compromised CMS uploads and disposable hosting further supports a malicious intent, likely to deliver a second-stage payload or redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baschin-heizung.com/meineBilderAlbertGrundschule/file/letivokefo.pdf In PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/c39d7dec1f47eecb0a6f018d3fae5620/99968043150.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612360f906d7b---tijiwamudupaxamure.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/11k4o8lv9v7qdleic8k6fvl61j/69531301455.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e633c4b8e2---jodiwefosaz.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3246bd998---wikofawav.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e658eb2ece---64248990338.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/nuresogivubutinum.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0aab857c7e---kemowopama.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/90347343392.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc9d88955e5---68266492285.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/9038731467.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd77a6196---93708635409.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/duvumivox.pdfIn PDF document text
    • http://candientuvibra.com/images/file/75559235741.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/t25sngrhvrdi080qbo67ag6v6s/gogasadupur.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/xixojowibugaxuzizupevida.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/lumopomizodoz.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lulugefidivu.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210710190654.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16115b7b984367---wopenuzateza.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608476592ae27---tafuzezimajukijonube.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/63798249827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=citoneurin+5000+dragea+bula+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_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 18080 bytes
SHA-256: bead5f4986257d748768ba51ea66f870adf717a5d435f3dea1f124386398e652
font_02_sfnt_off000125de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DE 11032 bytes
SHA-256: 7e0395725195cb62e4744a764654934d7a4c0825718f260ba91aaa2edc61e4d0

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