Malicious PDF — malware analysis report

Static analysis result for SHA-256 04eea34fd6194b3f…

MALICIOUS

PDF

86.0 KB Created: 2021-07-17 21:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bef1da389e931c36c715c776d981f1b4 SHA-1: ec014a52e8cdcb7ed9796b65621e5ae5f2b25ff6 SHA-256: 04eea34fd6194b3fab8492fb24da809064198b691f023408fefb2feb8e4b3151
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the structure and heuristics point towards the use of embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae3e22eff---75656205594.pdf In PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/jrg81oh4orga68q2qqrdjlb5t2/73660663358.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/26f1f1e3e914bbb119ad6a3086b8d397/tixebazi.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/99143983166.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606da6e70ac13---dovikelaxemop.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b82aa2e7cec415513d619e57e54b5723/21612515105.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210604153104.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/pisezemozu.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/89455856411.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/17623367064.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a398729edd---64792400865.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/kogiw.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/34206709269.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/964c9596c5cd8b0873220dff6e55601a/muwuzaxivoxi.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/lc8ucuneaf2viqs4gqt9m2ec31/33256932969.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/8627597411.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/870e267ead67720b13383e02d6131422/wowiwomabofixur.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/06a84600ae98f23775d31d4430b57803/binoxumolaji.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/88557648229.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9ce372639---83573991958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=places+to+see+in+venicePDF 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_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 17084 bytes
SHA-256: bdfb44de30e511989e36ede69a80d54a8471d3327c07a3217566fbf4525195df
font_01_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 10188 bytes
SHA-256: ab82b39326c209b2823e73e0610859171d94f8e8c26e1c4dfd67114a61b57568
font_02_sfnt_off0001330a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.