Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e092cde7f94b2e…

MALICIOUS

PDF

69.0 KB Created: 2021-09-27 14:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f24ccfad7756b5a264af2cf60a08ff3e SHA-1: c7e50633921aac9cd37c97481594f5f683531dd2 SHA-256: e9e092cde7f94b2e28bc4e60a4d64d50d7522b258d06ffae29c5e398e01af2be
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a secondary payload or phish credentials through the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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 https://infrive.ru/uplcv?utm_term=stick+cricket+premier+league+download PDF link annotation
    • http://fantacyhandicraft.com/userfiles/file/26245230556.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/52827750503.pdfIn PDF document text
    • https://phr4u.com/files/36450441509.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/sokom.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/13218291021.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/tumevunabupitomi.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/davusiporejewitin.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/kafiwaniva.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/94577601381.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/83778978021.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/20859658130.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd613376e3---mugagokajawotutibulimag.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/49015569008.pdfIn PDF document text
    • http://brukbet.com/user_images/file/mezapu.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/gonivowopoginitukatul.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614e40ff5fab8---68785133297.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/0a4d53175f28e4fa1dc808fb76855fce/97397905214.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/21035730348.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/tuxoget.pdfIn PDF document text
    • https://adikketiga.com/contents/files/30382512563.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/161439484c1523---86626477988.pdfIn PDF document text
    • http://polletnv.be/uploads/files/2117080821.pdfIn PDF document text
    • http://grotech.in/userfiles/file/64098293477.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/ligolonuvusilajiveta.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_off0000af6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6E 11040 bytes
SHA-256: ff8ce11a0125098a126d6fd2dd60dc78edbe2da570f00fd79f9f566b1713676b
font_01_sfnt_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 14952 bytes
SHA-256: 4f2725ddfe8b66b5182c54f55ef3ce943c8e8a4ec3cfc2b1d0ce432e21d00bec

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