Malicious PDF — malware analysis report

Static analysis result for SHA-256 9120302b7d9c9084…

MALICIOUS

PDF

80.9 KB Created: 2021-09-15 21:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: de302bf2074a2586075c8da3b8206958 SHA-1: faf74fd87e8a717bd75c78f4abb7369b4956e443 SHA-256: 9120302b7d9c9084052e90b6eb3e5ecdcafc499d8ea5a7e83cf69bf3c6356555
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://allytemp.ru/uplcv?utm_term=jordan+bolger+tom+and+jerry PDF link annotation
    • http://potentialdesign.cn/userfiles/file/1630681166.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf9e044479---92563271651.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/wofunuwejarevekeg.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/zuxul.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/94913944587.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/fac68813de6c0957404af4744f573d99/37329148229.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/wiwevuvufawezufejuje.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///nefokazojonojipejofonuzi.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/9omb7amgvnljd191kj0u9n8s8p/bojekimutogomafebifozito.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/53521943978.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/j9bf4k64vd4ir3cu7a5f5n2pod/goluken.pdfIn PDF document text
    • https://preciseenergygroup.com/media/dosiwupemofepupopanalul.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/gadepowipazasixovijebal.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/66753668406.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/korosemutabilub.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/gavokilev.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/43953143049.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/inipddiokpnga2jntbtjfjsiu7/bipurunipumenosuwulovu.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/fotidefosenelulufebuduxo.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/fowofuxuroro.pdfIn PDF document text
    • https://bawauang.com/contents/files/83175259081.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/roxusuzu.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161303e203a85d---jemofogazixorafijuf.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/34594539482.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27299096340.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/64779398147.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/92364336108.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_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 18056 bytes
SHA-256: 579d1976d29b9d9c8285902ad16cf03fc40059325d94bd5efe9e0abee71d442a
font_02_sfnt_off00011d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1F 10708 bytes
SHA-256: 03c67df2bddfd7a77d70ca433e3a3c232fbb77ef12c8502014444645c079fd6b

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