Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb044c91b79c4762…

MALICIOUS

PDF

74.9 KB Created: 2021-09-18 02:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 68c5238618f7c74fdbc11ed62576a558 SHA-1: d411d5fe0c968c4ffc994b01e8881f8168d3496c SHA-256: bb044c91b79c47625f5dc7d5695e722710e5a997930a55d23b738c4bf0bc6f2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs and functions as a link farm, with many links pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://smidgel.ru/uplcv?utm_term=homescapes+mod+apk+unlimited+stars+ios PDF link annotation
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f0b9c76e8---tawona.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/kixifuniboxipen.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161329a846a7e0---pezajalusemes.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210917050044_Z2VkYWtpamFnYWxheHV3dQ==.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161427aa080c65---zewameseruzasobefigavo.pdfIn PDF document text
    • http://xn--jt2b56wn0ap2a.com/upload/file/202109051012429439.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/39124454838.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/movubixoguwikawomirotulu.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/kedoxul.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///fedejifivaneru.pdfIn PDF document text
    • http://masonhn.com/d/files/nimesiz.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/lawitolu.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe4b9efe42---11353241700.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/40670573101.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210901/files/20210901142011.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/fupodu.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161374eca0052e---molesopafomup.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/81697517690.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/3458568371.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1613c205a9a65a---fukutilasurekuf.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/tazopubunekujugegot.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/35061691854.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/50346672345.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/paxibibetibuju.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614164952b367---73078509627.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6A 10860 bytes
SHA-256: 728c88dd80f5535d43c5d0f3c761dfb785f6b32e88d52594cd17eb1412bd028b
font_01_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 2192 bytes
SHA-256: 0f3377e5c5b4761d60682b0a17757323645e662d2a10c83f8fe6e8a1bf4f28a5
font_02_sfnt_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 15324 bytes
SHA-256: 38c9421c2521c39060792ddd700b6f7f7433fa5c295091b3629daea8969b1773

Open this report in the interactive analyzer, or submit your own file for analysis.