Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5be30ecb0da17dc…

MALICIOUS

PDF

94.0 KB Created: 2021-09-06 08:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4e9e101e905679e2dfdc40f4766954b9 SHA-1: bea8f37cc409e7ebe72f486f59cc8b719b0b473a SHA-256: d5be30ecb0da17dc5769c3472b3a9765f10c2106f8a5fa2958434d86f5445da4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised websites or disposable hosting. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=verathon+bladderscan+bvi+9400+service+manual PDF link annotation
    • http://indel.sk/userfiles/file/66770140873.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/67110633155.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/wukagojilisutop.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/vefenakonewerezomi.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088dfa159002---98679900016.pdfIn PDF document text
    • https://summit-christian-academy.com/scauserfiles/files/88983767919.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/33658666913.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/9efd6d9df2bba906bda8d2058409196e/vunetizekujolunulilogur.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/55245532230.pdfIn PDF document text
    • http://rayanchem.com/d/files/nekozuzow.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d1f2a2676---besojonovog.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/dopuvenegilapejuvuje.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607327bc930dd---juruxomi.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9dd3ea97---53726961551.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210819_5D8A1BC704FAEEF6.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/53839186376.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc34ef1efa---3387413464.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609758aaecb82---82675339904.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a160bcf363d---71071097641.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/tekuxasivemodubopizipo.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/gibupoturofuzatiwinawiwa.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/nulamobatenuvi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/fa61d8648fd4fc576228ec182df208ee/roboxozukowukupegezuxusur.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/fanusizuresujezeg.pdfIn PDF document text
    • 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_off00010494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 11280 bytes
SHA-256: 7b715a8eeb7d62aa2290369a9189a68b5435c176047193de1b18909f24f4ec7e
font_01_sfnt_off00011ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FB 19520 bytes
SHA-256: b77804e6106e86a72511e927fca5e5692feb67c8530324161f8925905612f666

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