Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe2488fe30294e9…

MALICIOUS

PDF

88.3 KB Created: 2021-09-08 09:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a70cf5e9377da18dff8eeb4f56eacda0 SHA-1: 72988cfd3636d4ade3556840f6565fed27643ec6 SHA-256: 7fe2488fe30294e9814fe4e08e6061328a158faea9cdc41039777b5c8e35713c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to host malicious content. The presence of external URIs and the nature of the links suggest an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeae032c67---wogakadisesivuz.pdf In PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f941d99d53---jupepiwefolodurewesugo.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/27252778200.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/pomunewanutuvubenobap.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/99341706856.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/42067155709.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/siverawonavizofuwawut.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/b35dmk04f5o0ooiceopvbpovv6/90681818497.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/83918644622.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/guwerovagiset.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/xodumimizewojumopaxep.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/39ed561ca658097bd0e1880b4efc2932/luzelofiv.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/98539210239.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/97d6f496e019f9662c629096f2f851f3/dupegogamagaxoju.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/2217649708.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/81029336567.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8stpt5aa8egiml7oo9nqpfm0t4/23716755831.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210805_ABBDE7797BF08C89.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa17f260b82---32103061270.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2a30eae0ed883bd52a2962b373112080/xokipi.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161135b00c2e1b---45100588305.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094723b182f0---zogutozunuriwiwidoz.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/soxadikaz.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021080318170780554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=knee+conditioning+program+pdfPDF 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_off0000f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 17164 bytes
SHA-256: 3c2d4a49fa6e4e5f682d3cae6a067980bd51ef012b8ead7b9b8d957ca090a788
font_01_sfnt_off000122c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADB 10740 bytes
SHA-256: a100e396aec04d00c3ea0485178bbc93c8cf603f6217961fb0526a45971aca1f

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