Malicious PDF — malware analysis report

Static analysis result for SHA-256 215cc17c4675ae00…

MALICIOUS

PDF

89.3 KB Created: 2021-07-29 17:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 324e195b02c77dcda94c36c0bd664100 SHA-1: 0bb5b62d482f52d97fea7d111c372e1b7eda4b2d SHA-256: 215cc17c4675ae00e1bb575e80cff066d53882d3ba0d29312ffaf62ba462e3f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload storage, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, but the presence of PDF link farm heuristics and compromised upload links indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20ef20fb27---28065935385.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/n5fk98fp7i2g327c00c5i9fn06/50701966194.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/jukokaje.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/53612110245.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/zevovonew.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/42950b6d810e55bb3e884d59dc48d113/teteroramerikomakumopaf.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/682dc61d514cb8f0657cd62f63b3187d/51787081209.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/89210208719.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b25bcd5f54d---mofelijelamopazifaluxitag.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210727_FDBC2FFD5818A364.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/8vcgulsrbc2na8at8k1dibvl7r/90948393654.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5a2a2effe---15973173819.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/e2cffec99faef9141789862d0e164120/jenegujajonavojebog.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa11de41f9---9499516504.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f22914d2625---gojoluzewulixun.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/42632702999.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/84518281298.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/knlaqo7tvrqsh8lblp3vkq4dn2/53542205787.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/23979801878.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160986cf81a05a---13913925501.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ba3bd53b4---silidatuxusamopixuko.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/mepek.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607832d23ce1a---95518337383.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/41698832560.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9307c0b805---64519363388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+the+best+diy+home+security+systemPDF 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_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 10832 bytes
SHA-256: 1f67cf4ca0a5a6151ecf601b1510ee9e56b572c72271d4e4401d7dfe7759f779
font_01_sfnt_off000112c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 16632 bytes
SHA-256: 3f2b05c8142dc410d048bb7f28297de8a12e2398308be1fbd08324a30f51ca18

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