Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b27fd4cd6bf309…

MALICIOUS

PDF

86.3 KB Created: 2021-07-07 07:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7903361c1ebce479b70754eedf1934ee SHA-1: 93768f9fac2c4a7f695d05a89f0cde6bb3959612 SHA-256: d0b27fd4cd6bf309a1c9ae6fe269f9ff64e771eadd0386a2e02e5602bb90c9d7
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The presence of 'cmdpd0pmjapaue92/5463076266.pdf' within the document text suggests an attempt to execute commands or download further payloads, likely leveraging JavaScript embedded within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://luvnchrlysenglishtoys.com/clients/861429/File/13367984380.pdf In PDF document text
    • https://nutstudio.it/userfiles/file/seribizawabixixutonege.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/0v5d58ragucmdpd0pmjapaue92/5463076266.pdfIn PDF document text
    • https://orrizon.ru/images/file/11059118221.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/60479315936.pdfIn macro / runtime command snippet
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fbf894cb8---bubelagab.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/xegak.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d849f6db6a---dudunobesotipiv.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b31a2042dda---64575734797.pdfIn PDF document text
    • http://vinamex.info/uploads/news_file/55227273238.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5b6f06241---dodudegosazarij.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/201825c6a9786d12cec113500b35f443/89900242350.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ee0351274---giwafum.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607806ca888fd---145501774.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c741ae48fa3---xekelifefejivojolopal.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608092d888d6f---fukekoriruniseki.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4b358b80aafaafa430c32453714f8fc2/48861732232.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/jevukanu.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/zamenesapobebad.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bea3f3536c8---66966159776.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/807b605aa6abf5da03c6e61a65877cc1/43578575157.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/608777269.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/refakolotanarivalowolip.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/trhlk4udtvjk7o2qsj1k7c32m9/dizukatifasizitememejeje.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/73264961196.pdfIn PDF document text
    • https://orrizon.ru/images/fiIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=oval+and+square+face+shapePDF 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_off0000edb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 17044 bytes
SHA-256: fb7e26e10144b8b0c35529e6f91a81f22d671d243589d37e169dadc2e0ca6b76
font_01_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 10744 bytes
SHA-256: f54c50ec4c72256ebc092c4f868c581d985a45945700e901053cfdb04dff70cd
font_02_sfnt_off00013209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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