Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f70b41f88269ce…

MALICIOUS

PDF

78.1 KB Created: 2021-07-19 02:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 453e058a22835d1635dc7ef4b5cd3bc9 SHA-1: ad9718fbda256d051148c96bf85f3b33dbb171f8 SHA-256: f2f70b41f88269cefecc617f065e35d23fd6fffce0edeb2aaed54d7e99178d46
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 embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or potentially malicious content farms. The embedded JavaScript likely facilitates the redirection to these external sites, which are used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/or5n1g2ec6rmv33p7as5dp6bd7/manik.pdf In PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/15322610075.pdfIn PDF document text
    • http://midel.me/userfiles/file/pedanusijawamofuvifi.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/sekerebofidanepopini.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d39a978c4a9d816ada7410edf68a818c/jupowuwigofo.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e8793222c---pulax.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/46081642975.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bf137e414e5---vibeboduwurodidapadivi.pdfIn PDF document text
    • http://banquat.com/userfiles/files/87132405136.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e0240217421c29fcfd102bf72edad13e/vezutege.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/14068456989.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/nq1da9u1io47ljhc13o09qrtd6/18021998198.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0f46a6c21767cb38db03c6eccba36b5f/60624251136.pdfIn PDF document text
    • https://kar360.com/resimler/files/fubosokuw.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210628041632.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/68269591119.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/d258a62a2f190d44ad13dfce31faa415.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/86258676924.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/87527eca19e0f5c5d99d00fec5f8c631/wewegokerov.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/f1638953589f6da7c994c3f7cbbf4b8f/vinijujotizifapebisasadux.pdfIn PDF document text
    • http://arablift.net/userfiles/file/47647677282.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac935da5e---jivusopukolixiwej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+simplify+square+root+fractions+with+variablesPDF link annotation
    • 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_off0000cb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3A 17156 bytes
SHA-256: 3215dcf1b3560d8d9e99cce8187b8c2d57b93cd0fcfe33a97c6ed4ffe28f9dca
font_01_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 11388 bytes
SHA-256: 4a4f50bf70d2aa6f4e230b5cb8818fc0dc533d9d15d094ded35309952a4ef95a

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