Malicious PDF — malware analysis report

Static analysis result for SHA-256 674545c09996c13f…

MALICIOUS

PDF

78.3 KB Created: 2021-09-17 17:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 38f5ad82f730eceec52ef7cd53f77e47 SHA-1: 244d9adcac4d9d9bf18acf093dabe52ae8c84881 SHA-256: 674545c09996c13f10f158916820e7313a6c11e608b07de5e6b61f707109cfa7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates a phishing attempt related to financial transactions. The embedded JavaScript likely facilitates the redirection to malicious URLs, aiming to deceive users into believing they are interacting with legitimate financial services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://medvor.ru/uplcv?utm_term=how+to+switch+castle+clash+account+from+android+to+ios PDF link annotation
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161348de9b2108---jidoraxutedepubis.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161408f4d7eb26---dikilunemodololud.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/tagetovokagifubogorun.pdfIn PDF document text
    • http://zerosquareonline.com/file/gugigag.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/16235219924.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/58846328982.pdfIn PDF document text
    • http://rld-carbon.ru/file/19659032797.pdfIn PDF document text
    • https://invision.buzyhub.com/files/meterurafosopigelir.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/nodedipowerowiparunu.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/sepogena.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7d73932b20386e3c76c7a307395781ff/lepemobukutixizova.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/88623098156.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/kifozixofo.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/divozaturalisuzepigoma.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/193cab8a5fa6dbc9e97af81f3c2d914e/9637215592.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109082205235262.pdfIn PDF document text
    • http://hangquangauto.com/files/kikaze.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/95782931037.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/57028864631.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/62574547927.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/sagapogup.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/51295332286.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/fofivodolalenitatadigewe.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_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 19256 bytes
SHA-256: aecf0ada15f70cb06b2568f1589c7441bc0ad182a9e6f9701df3f47b80d12892
font_01_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 10916 bytes
SHA-256: 416e23c1420a627e7d158bb5983170ecb9b816f50ffef3008e3abdad29ddd4f4
font_02_sfnt_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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