Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46b0d7b3fd1f32b…

MALICIOUS

PDF

88.7 KB Created: 2021-08-15 15:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21da6a2892b28aa29ef9720879958c77 SHA-1: 3c2c5f10aa5f36e775482ea6d9a089cd509b5304 SHA-256: e46b0d7b3fd1f32bec7985a1b33aecfd7efdd26ce7e8ab209fc5287c8cb03a9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous other PDF files, many hosted on domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious document designed to lure users to external malicious content.

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://consol.hu/images/uploadedimages/file/84557967966.pdf
    • https://festival-bg.com/media/ckuploads/files/61933453987.pdf
    • http://accessiblevehicleservices.com/userfiles/file/nakopenenidixijorokaki.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/foevree0991erahl1gfeu0j04b/55283689978.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/380848d09169554f2652435f1ca9bc52/27364512287.pdf
    • http://smartickgroup.com/userfiles/luregubivazolubizuno.pdf
    • http://aep-tc.com/cache/fck_files/file/sitakugebis.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1731c14973faa0780518a837fbccea9b/tugutajamezel.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ac101839751---71275321704.pdf
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/49151509577.pdf
    • http://mramus.com/fck/imagesfile/xagivovunezajuwe.pdf
    • https://artasedanasingaraja.com/uploadfck/file/masubiwaxufaparamepo.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c588677285c---fomijijupufamijoxosivaz.pdf
    • https://anukulagrotech.com/userfiles/file/torid.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc83ca7335---wuperotewemifubixigujot.pdf
    • https://fwullong.com/upfiles/editor/files/ludedubelul.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f00685aa6---folil.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db2abf362---fipurigufujusewu.pdf
    • http://syuncyoku.jp/upload/file/fenug.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/9ed2c9f3e8c82e9e755bb4f28c0e9d4d/67754358279.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/h0aikqg2ui2958jqhafde7atf7/95093670318.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb9f8a6e7a---lekogu.pdf
    • http://auto-spec.ca/fck/file/84069768889.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/8b444dd1b85c58fa016f13a89708cc26/50809113455.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/96141322958.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=furniture+mod+minecraft+pe+pc
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f616.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 16792 bytes
font_01_sfnt_off00010e2d.bin
62039172a896a1a37f6bbdf6fda6b5c538bc3258bcb1c6e5cd084ca2e52017a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 10644 bytes
font_02_sfnt_off00012679.bin
13e5bd366638b7f5f4232b05399f978895a1df5fc47d8dd815642ce9dcfd3e9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12679 17640 bytes