Malicious PDF — malware analysis report

Static analysis result for SHA-256 f572e71855e32412…

MALICIOUS

PDF

82.6 KB Created: 2021-09-24 07:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad1b09d780c1e944e9c34aab8c846c1b SHA-1: 1dce8b61896f85aac27b8ac6906334b9a2a6b09e SHA-256: f572e71855e3241281ef3086b29f7bc5311bc9a1b6144a216da31e47e5406530
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. ClamAV detection and ML classification strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/4bf59af11f59e0cfe29d281509df6dc2/xoveg.pdf In PDF document text
    • http://tornyanggrace.com/upload/file/nujozet.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/viwesikopoba.pdfIn PDF document text
    • http://machin.kr/userData/board/file/14788766031.pdfIn PDF document text
    • http://konberdbio.com/upload/files/lonuw.pdfIn PDF document text
    • http://falerisztika.hu/tmp/88794645435.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gixusukewapapepag.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/numoruw.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/zetinix.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/8062263542.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/nirirodexusuv.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/16465391086.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/86276483527.pdfIn PDF document text
    • http://skia22.ru/pic/file/zesajutixet.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/39703382941.pdfIn PDF document text
    • https://redac.ch/upload/lebelovabo.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/16654532533.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/56018908401.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/buxasokof.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/32173711985.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149295db53cb---82256855385.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/mawevoxowopubeponarelab.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/97013223249.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/jarunamerafakomor.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/21658655072.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d0718b5527---pirotulebopizoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ocultar+modo+desarrollador+androidPDF 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_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 18504 bytes
SHA-256: 1c71e9029d439189792f242d0533ae6ff746a089e2a679e94673dfcae8304827
font_01_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001239e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239E 10656 bytes
SHA-256: c622e9b769b0a63b84b7486b1c607bbe404226000bc23bc6094b2c715f0bf392

Open this report in the interactive analyzer, or submit your own file for analysis.