Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2026dab67f7f21d…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 10:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d3ed8fef83362ea9d8b1aaf6132a8235 SHA-1: d0e6673fa538dbdb20fe9d288b29dbfe0d8b9937 SHA-256: c2026dab67f7f21d3b7b3c03a5bd64fcfb3d73539e9cff5e1567c563880b2dac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This 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, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=instrumentos+de+medicion+de+temperatura+y+presion+pdf PDF link annotation
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/5cb2d757d19a06869844b158f58300ef/japepojizatinekeme.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/telupiwinagufi.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/bubanilifagefe.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/duwaribunaner.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/soberirurokivudupabud.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/e0f7b94bde7658309a9d65bdc6a9ff6f/jafoloruzupeluxamolu.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021072620125380554.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/17833512866.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/xakivekijagibadaguxabov.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d81795d30---73484662970.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608445e894f3a---60597823189.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/rudijozezofizofafagevidop.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a071763345---fazewuzob.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/beripukomozobekuwilu.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/5039768f05e6d335e9764b230954032d/puginepezuluzebu.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8fe31245b---94966973437.pdfIn PDF document text
    • http://asustainable.com/global/file/56518182078.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da66c329b2d---72325795683.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/xixerakoxibekilodonikave.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9035497140---giwerinukafu.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608120da1ed42---wakerurufe.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/dazafifurivubodel.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/nopiluvezumibu.pdfIn PDF document text
    • http://quinta.cl/upload/files/fopovavatudelafofox.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160958e5dafdfe---30846135720.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 10900 bytes
SHA-256: 7df63af09df91bd7bd0f24848e7810bb83bd2e6d82987ac6ddb779b643da2406
font_01_sfnt_off0000f4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C3 18552 bytes
SHA-256: f219462eddf910575c3295665193d36bd31ae707f8cdbbe830a3ddda3a8582fb
font_02_sfnt_off0001245b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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