Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d8cb6e55053e2c…

MALICIOUS

PDF

88.8 KB Created: 2021-09-22 13:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 44d1f06d9e6497cf68af678904da5577 SHA-1: 70824a38a809a0e6c79c548abb4c491a0627a833 SHA-256: 02d8cb6e55053e2ccdb365676c8781c935fdff06d0f871b95a09d23506ac545e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity. ClamAV detection and ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://cructi.ru/uplcv?utm_term=watch+boss+level+full+movie+free PDF link annotation
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/kalanokowozigo.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/044bce41fbbda4a61d55ed503a44a4a2/mipazuwinonakidilutogavu.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/96384407545.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad27085b1e---subuwijarowepul.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/13639797463.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/lesirifukusunokelebefim.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/lofuxaluduwodedirelijeb.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/11283712304.pdfIn PDF document text
    • http://intertribo.sk/files/duviwubutazebomas.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/35439382569.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/12987798054.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/kekosuwogere.pdfIn PDF document text
    • https://medius.sk/userfiles/file/36521325017.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137aa8f079d2---sabuzavediwexix.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ddb560f02---21555570994.pdfIn PDF document text
    • http://apicn.net/upload/files/79946580464.pdfIn PDF document text
    • https://somogyplusz.hu/files/zoxejowirogamimokowav.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/35740388946.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/91573888287.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/bcfcvsuar76pbfbcrhv8fb09cp/71947456974.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/40723180142.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/nusajazisatul.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614205552cc19---80247783308.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132a7677d483---93667155726.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_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 10796 bytes
SHA-256: 377e231dde29b60d3e85bfe1cf4c013fc3fcf5f30e76b8e57b8ee30115fb8453
font_01_sfnt_off000110c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 17596 bytes
SHA-256: dad10863188cee29ee3b9834c7d818f1813342f94bf006a818cc267b22a1d2c9
font_02_sfnt_off00013e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1