Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fc700705375967…

MALICIOUS

PDF

72.1 KB Created: 2021-09-29 10:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ff0ed709978916df2087abcd6c58523b SHA-1: 4b9c37eae2a380ec1b2884f84b9ac9778a536366 SHA-256: 75fc700705375967a9114e9ca017ddee989944ea8bfe6494e35d9b334dd1412c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs that form a link farm, pointing to various domains, some of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=phone+font+style+change+app PDF link annotation
    • http://farmandari-sarvestan.ir/images/news/files/dukezudebemoxu.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/91690552955.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/lakapa.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/tonafunefa.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/39868656418.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be155206c1---26569907521.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4308e44f7---xizuz.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/xozixovegepij.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161351637e6d4d---vupuvizotozevajexazuzo.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/dusasolewuwaxifofuves.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1632475488.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/vugerumabagozomusumuwu.pdfIn PDF document text
    • http://opersan.com/file/10421999728.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/doxenanunemutopapuxilaz.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/61346520894.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/jodelolukawavo.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/23260567206.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/47002301457.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/biwojevuwotiwudesofaremo.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/pamalajudad.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec9bc622b0---mifisopo.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/safivuve.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/27742456833.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/5a4ac449ad7d6792ec840043a3d83b52/jadebujadoxidefotit.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f99be7efb1---63584846575.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613952bd920fc---kibipawixu.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_off0000b4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BF 17696 bytes
SHA-256: 33d94ef9c08fee634fb9d04841c822e63134ae53dd7374098e760b54e7732063
font_01_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA76 10684 bytes
SHA-256: b0decfdfacd6df1e8d8cecc4150d6b3570dd2f2eaab7b9f2068b9fcf8d367e46

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