Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2490d39c6c70ec…

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 02:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d66c0bd0afb36f72bda397090d23e205 SHA-1: e76e6b898fd8f4c090ed12005b9590411adb9bb3 SHA-256: fd2490d39c6c70ec7ae97e0530fc14ac5e6a9c1433008ee7d147acf174ca3d1a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised websites or disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://friend5190.xyz/js/ckfinder/userfiles/files/9758680115.pdf In PDF document text
    • http://vindindex.nl/images/uploads/35057496004.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/92274332045.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/wapebelusalega.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/jilovakapemedelet.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/susejazirubakozubuvibuti.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613918fb60ba0---23728697810.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/39148490351.pdfIn PDF document text
    • http://djapm.com/userfiles/file/66530052632.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/11541242181.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/fiwenodi.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16134b6f43f240---xexuw.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/modoradexu.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090222571773499.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/xiwapikete.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/sabijotofisowatijemuzataf.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/3mpthcq79192mhja2f54dagu3g/jisidevufizipax.pdfIn PDF document text
    • http://epmachine.ru/d/files/luwanogajulimevuxatewat.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/zojibijute.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/ririnek.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/5594522671.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/wijalogurodenepovex.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/vevosorofonexewomasun.pdfIn PDF document text
    • https://ipkameros.lt/userfiles/file/vifewegivabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=vex+lucius+l6+qr+codePDF 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_off0000e2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 10484 bytes
SHA-256: daf37bbf4d9daa67b8fe25a3046323c42ccf46d88d846d45ab90502df99eaa42
font_01_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 17744 bytes
SHA-256: ab64d75ae90921c1b30d7351a76fb42e2d99bd109d08603d28c4c4357bf8ec3a
font_02_sfnt_off00012907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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