Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e602a108fe7169…

MALICIOUS

PDF

69.3 KB Created: 2021-08-11 10:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3da352b557688ac320095b9bc2db5e38 SHA-1: 97c02118c104cabe4610f4afede80b92ea252c1b SHA-256: 28e602a108fe7169faac52f680bad7dd7c4bc6e6df2de5a7161a7af98f9244b4
154 Risk Score

Malware Insights

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

This PDF document has been identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be redirecting users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8572

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=how+many+pages+is+a+gang+leader+for+a+day PDF link annotation
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160772be3b56b3---7234752615.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/37738580340.pdfIn PDF document text
    • https://anakmeong.com/contents//files/datilidosoxixilida.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786e82f2d23---15421925514.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/6b06901f9f3dd2b1c9b54776c68d6cee/94596843389.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/35830082829.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/vikufexirepug.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/fimaka.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/84021827634.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/85471300875.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e650d6d5b3d---mezenivituzetotolexewun.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa06f142f9---samuxubegudoxokesu.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4b1e3a162---norasurerojilotafimi.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/bf1f5e01a8bade7ca8bb0a7bf7d7c8ff/31139752714.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/tixani.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/bagade.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609718f2179eb---89206356663.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/fezewowazomidelakoke.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/17227699294.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/34994299669.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/javorupa.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6748a80a9---1201504760.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/0db1e1a428f7bf8d346b03c668f29ed5/vifagixixamolizo.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/sigidurikok.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1398b453c1---32458546808.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/2026398989.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE94 10936 bytes
SHA-256: 2d63c5467050b2b4041acebe61066370afd63b7538f280c2ac912d56b0d6037f