Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee1962c44bd75e8…

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 14:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5638d58e5dc17e4d096b0f501d6a33ab SHA-1: fba0b3166767e7fcb02291b9a2a9df5f8d360b84 SHA-256: 8ee1962c44bd75e8d7fe02ad6fd7aa92a9585aeb83d86e7a3d8e501c3b306d00
204 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing attempt impersonating Netflix. It contains numerous links to external sites, many of which are on disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://drafthe.ru/uplcv?utm_term=malena+full+movie+download+utorrent.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=malena+full+movie+download+utorrent PDF link annotation
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/fukato.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/73100115520.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/rixuzukajamidawalarilu.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/lorapilomuwadososo.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/68056178450.pdfIn PDF document text
    • https://fasaac.org/temp/files/zorapasa.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/fanogu.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/mibowaxubonaleraz.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/bedufagipibosupelumi.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/69643000854.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/26068327672.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613356e472dbc---85317669320.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/623ab2ba2a38e322bf2e24a661e857d1/274061034.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ac8cf1cca---270677471.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/95819028402.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/nevukanaseduso.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/puxaxumetil.pdfIn PDF document text
    • https://thehouseproduction.net/file/31576466627.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/46801739999.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/rolujetakalar.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613a49b21d9ef---39241622236.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_off0000d999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD999 19096 bytes
SHA-256: 1729a6f66abeb6cd1606b89d142338472f8c985edddefec4fc609808e865016d
font_01_sfnt_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C1 10592 bytes
SHA-256: c99dabc4d2e11f02f802d601021fcf4d3f646e474c5c23b98921cdbce7ece713

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