Malicious PDF — malware analysis report

Static analysis result for SHA-256 5714ea654a78094e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-22 14:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fdd22a8faa493c86ba338428f93511db SHA-1: 2de7893f0b83aa81b0adf36ec1c13ddc7f7c74e8 SHA-256: 5714ea654a78094e8e121811832175c573673197efdc3b8cb24a04d9ec415422
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF is identified as malicious by ClamAV and an ML classifier, and it impersonates a cloud document lure. It contains a link farm pointing to other PDFs hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. Embedded JavaScript was also detected, likely used to facilitate the redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 8

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lejonhund.com/upload/tasasinufe.pdf In PDF document text
    • http://chromavials.com/d/files/dawasowuk.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/wemobubitemogup.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/73916098600.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/91007885168.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161362153ebb68---xafoxaxoxexejobifeta.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/47153723973.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/sesuxamipigujuxej.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/pakogarunedol.pdfIn PDF document text
    • https://andana.us/files/files/fanovenenir.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/92950611078.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c470bd0deb8fd8c37eabd571fedc3ca1/6213131806.pdfIn PDF document text
    • http://a899.net/userfiles/file/22328375234.pdfIn PDF document text
    • http://travellerisland.com/files/69928582506.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/misugivegazejekub.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/kopufenupobadefukano.pdfIn PDF document text
    • http://chinazzjx.com/d/files/bavademevaxeg.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b892d53ae---72613673583.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161382fea2a21e---31172070050.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/45473093342.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/96923259730.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/kenerotukigegeborewi.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/21221254612.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491e4574507---58232768057.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210904000350.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/gokumavizup.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/57637673666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=paleo+secret+30+day+challenge+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_off0000c32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 11216 bytes
SHA-256: 0f53840e2b838d5506f6c75c31d965def0ab052317c0b7aceefb0a5ed3ca8ba2
font_02_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 16156 bytes
SHA-256: 3b3206a3e086e11f6e279d8ee41ead5133ce5b4bbc4be69d544e06b78de2b885

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