Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f4b01f44f315c2…

MALICIOUS

PDF

82.5 KB Created: 2021-09-24 07:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be516d68607e2999f04f9a649bc85157 SHA-1: f276d559e4a32c3d01bbb1c64a61b85d2126ad97 SHA-256: 50f4b01f44f315c2509b365c98dd494ec215ce8222d7eea38e07db5af95baa10
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and unreadable, but the presence of a link farm and embedded JS indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=disable+control+center+from+locked+screen+android PDF link annotation
    • https://inprovitmexico.com/ckfinder/userfiles/files/tazexemurusomu.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/86361091296.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/xudirutikapumebovi.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/43512153670.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/wowugibaleximod.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/lilub.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/44782239390.pdfIn PDF document text
    • https://n-tlg.com/files/file/61579580773.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/81533991769.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0fec3f969---neparagawerexotubaka.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/tulupulufipaj.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210922195845138.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc7daee27c---zewiwobawavutajevez.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/begilapowatugizilidijugel.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/xupuguwowijero.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/84132027939.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/vesamewelesejazozafali.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/lukotifureturoxotimod.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbe7d6c5fc---siraralizeg.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/30727720323.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/gikegojaronulatuv.pdfIn PDF document text
    • http://cloverdiamond.com/file/zilikomipevufokir.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/magilawirixureralaraxur.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/10218126550.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327ea4551f4---20847188100.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_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 10872 bytes
SHA-256: b97b7af38e0adb53eac0d39d2da0ee03e13ae15d1f435270abb76b25f31b3316
font_02_sfnt_off00010eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 17492 bytes
SHA-256: 3c54c7523774ae55533e1a409ba1232835edd99acff9d07ca9f20657e548e1d0

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