Malicious PDF — malware analysis report

Static analysis result for SHA-256 5264197fc1d20d66…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 07:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 238135c9a4b67f7536baac2b0a2214f6 SHA-1: 084ed26b55d7fa58edd606ccb2ed085310589d35 SHA-256: 5264197fc1d20d66177dd4fcd73e056c0f1c3d98ec0183b81ca1b9c577858241
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099efe3cc451---23123633399.pdf In PDF document text
    • http://ifa-astrologie.de/userfiles/file/20033032880.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609404101dcff---6695493055.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/022c6c8ee8c3198eec1ac6c5005cf0a7/murekojepuvopepu.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/12d81ee29aa703a3c668252f37b90845/15305404625.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/62230258652.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/ratonatob.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/sugitufan.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/a9e9219d2bad86b6199768efd7a2f735/juvaleditijodikalur.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/71113406141.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad396c13ab8---jaxuxajon.pdfIn PDF document text
    • https://t2sc.me/userfiles/71376234828.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/30703729451.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/98105076948.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/7879007979.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/0be1013b3035533e226868175b169240/23539775783.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/lilasapolawigubu.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/7401835008.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd790cfc53---64239274821.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/50eb79a1c881da863bd662e6a4af143f/37990080734.pdfIn PDF document text
    • http://kasargod.net/uploads/file/sugir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=livro+temperamento+controlado+pelo+espirito+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_off0000d11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 10804 bytes
SHA-256: 6a8a1eed32a1dc1ed8bf08b6d5d08919d0c1e218d76e0c957050c51c5d4dd0e3
font_02_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 21176 bytes
SHA-256: 7140400b4f62b3305229ca650aa97bb647467f9a7524e2ae2b3022bce707bd2a

Open this report in the interactive analyzer, or submit your own file for analysis.