Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe60176faa13a50a…

MALICIOUS

PDF

77.8 KB Created: 2021-10-11 04:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9c4dc737c32c834d999cbe0ac57cb6b2 SHA-1: a13cc367d24a6a241c8275507c9402f99859a224 SHA-256: fe60176faa13a50a12e00bb17cf65cb63b50ae595cf0069deb8f6307ef30a988
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 or disposable domains, indicating a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests this is a phishing or malware distribution lure. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://wastran.ru/uplcv?utm_term=tonsillectomy+instruments+pdf PDF link annotation
    • http://jedzenie365.pl/ckfinder/userfiles/files/27933751426.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210903_E69130061EC6A722.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/sosoparumiwuvo.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/95037962986.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/rutegasoxalixumife.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/posonenatafapixir.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/fizakajebifulavewo.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/fejijadilunotagurimorew.pdfIn PDF document text
    • http://sperkyfanfan.sk/userfiles/file/9890876255.pdfIn PDF document text
    • http://digifast.cz/userfiles/76730097373.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/kiriwajawawofisudowumujik.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/28993843906.pdfIn PDF document text
    • http://sbkf.org/files/files/64560375755.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/sedomezuporavibo.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/mugexivubu.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155958645f31---viludolo.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/tuxesevetafidutanurujad.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161533b7097e8d---49486820781.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/vawufufimalesavagesod.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e56a584ea05c552068dfcefa708a3285/50291482758.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/zarowene.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161422739916ae---novebunevupixusuguxefi.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/1h17unnnhjejgco5vd8f652ef5/wuxomebukadape.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/67001405402.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/vawodajudororen.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/fozoxabofeximaveno.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_off0000cace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 17376 bytes
SHA-256: f33634925360169bca97c1ab846418d1bc4f0280ac7057f5082cc342885e5f9d
font_02_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 10796 bytes
SHA-256: 117a91edc28f5f60e59f88462ea70e40481850818146676c8c6660a021c74d76

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