Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2ee72ff4f88a4d…

MALICIOUS

PDF

76.5 KB Created: 2021-09-21 12:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3be3e82e2eca2de7a797814852a59ec SHA-1: 7733e8182606ff18e0997613ebe2aa806033e086 SHA-256: 8c2ee72ff4f88a4d82d1194e7175a7ae4284b51ede52bf3fc224b67f84ea852d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded JavaScript suggests it may be used to exploit vulnerabilities or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://eghamatyab.com/basefile/bainbookcom/files/tugotujakaxuvutomutaw.pdf
    • https://rhuyscampingcar.fr/images/files/56692244756.pdf
    • https://hrmconsulting.biz/upload/files/11331830986.pdf
    • https://kidneystonetreatment.in/userfiles/files/77456614450.pdf
    • https://careersourceokaloosawalton.com/files/public/kimazefig.pdf
    • https://airbays.com/userfiles/file/fedegibuxawutonaxoz.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135361a324ef---mobagupoxekonofinefoviza.pdf
    • http://langeline.com/ckeditor/upload/files/87437797655.pdf
    • http://magnumprint.ru/upload/files/32371269639.pdf
    • https://classoft.ro/userfiles/file/zoxewi.pdf
    • http://boothbayharborshipyard.com/userfiles/file/vozozufub.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/c3fcdad5585f47abd6c7ea68a9af8f17/90443499094.pdf
    • http://to-kajihan.net/js/upload/files/70815442510.pdf
    • http://fikszo-whc.com/userfiles/files/gulufazubasamimoxekoji.pdf
    • https://condicionamentofisico.com/arquivos/file/vusotuma.pdf
    • http://bckbytow.naszbip.pl/img/upload/files/wewerowulewifexazipu.pdf
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/96998893454.pdf
    • https://eastoncn.housemember.com/uploads/files/95088218116.pdf
    • http://gyuco.com/uploadfile/files/20210911_092908.pdf
    • https://ibextrail.com/editor-images/84588853839.pdf
    • http://mackits.eu/image/37487571489.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=gta+5+apk+free+download+laptop
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c42a.bin
05f68a05dbda42b0aff55f0fd7a648e577b8d2592b6adf231a02f70b90b7a5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC42A 18312 bytes
font_01_sfnt_off0000f3f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 16792 bytes
font_02_sfnt_off00010c10.bin
ea3ae38166c7d143c1febbd29202540a7f1d31f7b91b93d0baf37ba59b0cdad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 10584 bytes

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