Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6e064739f92028…

MALICIOUS

PDF

89.2 KB Created: 2021-07-30 02:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 70948d8e14a20bb79e4343a70365ad04 SHA-1: 1bbdd5c7dfa05a09fc84082c608f61e6749eacbf SHA-256: 3e6e064739f92028b28dce0a0a97d1405925a63e46b033d3694d8741369ff487
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic and the ML classifier's high confidence score further indicate malicious intent. The primary URL suggests a lure related to 'roblox fps booster script 2021', indicating a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://catamma.ru/uplcv?utm_term=roblox+fps+booster+script+2021 PDF link annotation
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/10f8ed5fed84e404132f92dda1e94ac8/59757278481.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/kaxuk.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/77206869339.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/19447287088.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2f11067bf---99430360858.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/6acb9e9406a2f771314dd7ea8a3607c5/tovomokoxagajevudu.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/52313321345.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f3d24a26a5918780c8ebdc3a11cb638f/zuligakazolen.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/nunaxugojekimepu.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160875310ea953---58691489173.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/favuvinaziluvurokisi.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/mubefaxesazunonogedemesu.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/xasog.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/supajuvo.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16081a63d65b2e---26739351271.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ab77a815fc5---posikejomarelosal.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/34595636306.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/bojilixinamasabakus.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/ba5ecd5bad2e4ba2fc47ab5edbacc7bf/95844785375.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160981bc78342d---23777658777.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16205202967296.pdfIn PDF document text
    • https://maclashoes.it/file/bijeru.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/feger.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_off0000f908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 17324 bytes
SHA-256: 125bcdf63eb1ba8b3880150b545841a665f5ccd27840dbb6c6a4e6201d745af4
font_01_sfnt_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E65 10788 bytes
SHA-256: 9126c917578a1d52698a10a5899444b6bfe9fb9c18c51518bf8de76d781133a7

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