Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0429849b334102…

MALICIOUS

PDF

78.0 KB Created: 2021-07-02 13:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e1b814b580bf7802ac4e679dd0b7b6a5 SHA-1: b3576dddbe644da0984e91a0df3fa7f132e3e57f SHA-256: ea0429849b3341024d007ce1213dca6fcc0a4ff6750e748aace903f7e53480ba
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of external URIs and link farm heuristics strongly indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://daxitrip.com/basefile/daxitripcom/files/26458512333.pdf In PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/1973v1kpluf0q67uda10ctikvq/78253111649.pdfIn PDF document text
    • http://bwc.lt/i/vonurulorexasawopox.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/1798374604.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf052a8a948---vugakimeravonufabaz.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/fupolugofanolisimojovab.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/sejafexuvofil.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609293daa537d---79040161680.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e26f7c5a90963d78e8d0dde14a0c5458/gixevawemuzexotu.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/vojogutegomulozib.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/bolanuzezo.pdfIn PDF document text
    • https://parfumzone.ro/files/file/28834177245.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5e25117c31bd9be7f5577037efcd8eea/47485029969.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/29733370270.pdfIn PDF document text
    • http://nakatka.com/files/file/lomejevemepipajumenubis.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/31843606009.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/0b4a58883013367f55727c0db4008ef3/44829488963.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/0ks27tv7lh8p7vfp0r9qvckg43/47876394956.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/45935041556.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/lined.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rdh27q9gjt9q4m0b86n8jflc40/tulebaditolulawisulakaved.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=english+comprehension+test+with+answers+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_off0000ccba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 17068 bytes
SHA-256: e653f9048811627039b8a0c7bcd31ed40202915f5b1e2397be01e94434bdfc81
font_02_sfnt_off0001112d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112D 11136 bytes
SHA-256: 0ced76a254a6661356e560f8b2f9995dbdc4d5e49949c8693232e750209f81c0

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