Malicious PDF — malware analysis report

Static analysis result for SHA-256 6feeeb0d25fda60b…

MALICIOUS

PDF

86.4 KB Created: 2021-07-03 11:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cbc5a6386bf27d5af48163cfcfb57c97 SHA-1: 4b3e65118b6edae2473378093c369a689610e319 SHA-256: 6feeeb0d25fda60b93c6971a98aa34042f8292d7dc083ce994e3c424be2aac3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a56fbe176ea---92104479611.pdf In PDF document text
    • https://creativitagh.com/pevron/www/img/file/bedavavilulobazawug.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/fidefajuxeledazolazalozal.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/4d7d414113953ce41457207f57339688/kimodowatarovazotamav.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/vumuxobakifibo.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/67156eaff65d7b6560e5dfe76953ca6c/45868666943.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9a50489d772ed30b0e2b1a22b5dfe77b/vepegifuxubepotumajil.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/353ad595a9678dcf63bbdf994c46133d/vivusoxedumojulelikime.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/33456981274.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b96cb83e24---86774234285.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f77e404ddd---23858575557.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/xajipiriboduwopawizam.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/30tj7ur9q8ts8f21pda0sg8k27/21694667923.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/767ffe2b6138a1091af9d506af1402c7/45045416199.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7f714350af5c68d467cc0b72e942b75a/wiximoxedibav.pdfIn PDF document text
    • http://blatt-gruen.ch/files/99398387378.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e1a3129586f61b3fd56c0515ad2a9b3e/73892687055.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/39762797390.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2c5bcf0f302fc9f89bb411cf5f7440e7/jefivotiduzebijemotikobew.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160711f8638a88---zogeralusutogujewemepa.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/bigovosusexa.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/goseronetikavuzexe.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3af5a26bf---tazinam.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/73675383222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=angry+birds+2+movie+in+tamil+downloadPDF 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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 17708 bytes
SHA-256: b59866e2a30123a6a00e4e755793a6cec3de0b779d68074944fd72c2efb6a392
font_02_sfnt_off00013240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13240 11100 bytes
SHA-256: 163c9367b6c4712ad41a5109c6ca29a88ceb96b789f3322e109421f7330c93a2

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