Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17e43816d9bcb07…

MALICIOUS

PDF

129.1 KB Created: 2021-06-21 18:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 008ea7b8b886a3aca24812365f78acc7 SHA-1: d1af2f5682f865cdcb0b78bf3cd742a51a18450d SHA-256: d17e43816d9bcb07588a687baa3e1ad0ceb69a0cd7860f243394a49bd904c63b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that appear to be search results for popular media, likely to trick users into downloading further malware. The presence of compromised CMS upload links and disposable hosting suggests an effort to obscure the true origin of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=boruto+full+movie+sub+indo PDF link annotation
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/lnnai3heeibtjmsa3rmcivp6a7/66938373065.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a086ba65b8---30108621055.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6b92cac74---zalezenuputanopeko.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/osrlja6kcoerpkie15lra9d9c1/jakini.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/525180e0e122459233670dd492537014/15475776559.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d1ec6ed824abb7771dae55c33f75d124/16445560312.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e63f0b58---gujowuriwunive.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/39678953806.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c390f69cf1d---69749304508.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/b28c8a62f9713509259da00a90ddb538/kofojitotavidomol.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085aaaae53b2---narabonozufogumopez.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe2a79b658---jatepopig.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/loxawifuzize.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/21989857627.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae094ed881---tamuburunikubegen.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/ee0892151da7e1a926ec50e7bdee167b/lorexapesakeb.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/ruxizojoxobetivosivi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CD 40936 bytes
SHA-256: 71c2f1b0722dadf429c7ce0fce300af8548c4886f5a631e2dd190906236ff037
font_01_sfnt_off0001a602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A602 5092 bytes
SHA-256: 6b341849adebcae44e0ba2cd46291baa73330f084e5c3d8e30c12071bf60e6d4
font_02_sfnt_off0001b74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B74C 12128 bytes
SHA-256: 2943c2e0a226a9ae8f314579c2992d67fde899b9863b4e68da04417204e376ac
font_03_sfnt_off0001dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFE5 17112 bytes
SHA-256: f9dc15b9e7e1a45eeec377706f6e9859ce73b6054018bdf95ecdbdcfaa16ab0e

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