Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20e0a0015b0cceb…

MALICIOUS

PDF

86.0 KB Created: 2021-08-21 03:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be89159b18ba77500857d6f6f7462039 SHA-1: 1e21e98b9dd8b907555d29ac293ad2f508b29f79 SHA-256: d20e0a0015b0ccebbcac373c7543940c94e687d305ea320b5f365c5e028ba84f
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to multiple websites hosted on compromised CMS uploads and disposable domains. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10296072b0---gepedidotosoxebipepu.pdf In PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/togidebugikaxot.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/zugazifeganidisevumojekis.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e17ae43a6---97956459950.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/27197788107.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/jetotepi.pdfIn PDF document text
    • http://michalbaryza.pl/ckfinder/userfiles/files/ralop.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb22e69581---gizerovepajovaxu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/54c067c3b7c7cac56450951d8a553b9c/duzegejobera.pdfIn PDF document text
    • https://polytex.de/sites/default/files/12766737546.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/fovibeg.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/tedupamaneru.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/wukoxugoran.pdfIn PDF document text
    • https://istihdamhaberleri.com/upload/ckfinder/files/43826324382.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/752498311.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/matin.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/177ef280b5d54a08bc6cab3a5102c5dc/bigimuzagivos.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/tj00r3g7d7qnb5g5tahbl0l568/xapiponedito.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/mujuduzep.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd7e216776---majipokijemigezedasexov.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/58460037627.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29581a3db---watevubilotiviralazobe.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/pudisisomijadevafimusatur.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/vuzopopalesewefasakezufa.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/tibuwepabovetiduwi.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/79433583033.pdfIn PDF document text
    • http://mosjob.ru/images/file/20089801408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=century+130+mig+wire+feed+welder+manualPDF 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_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 17484 bytes
SHA-256: 4a41f90a651889c3f705db70cda1ef012ccf9d56fce82de085a97a007b38846b
font_02_sfnt_off00012faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAA 11088 bytes
SHA-256: 0016b95773237d6ff40fd1f3121dd6bb259527121ee9834890e2135c7cb5c984

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