Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7119400a425c100…

MALICIOUS

PDF

79.0 KB Created: 2021-07-14 04:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: cf95b4013c0e92d2e7b520cc8eea6da0 SHA-1: 18b297f4d0823173fded3f73db615c2d1704ff65 SHA-256: d7119400a425c100ae4aa0bf4650d0f537af238ff9c872d3ceea60b6a28ffc3c
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, many of which are hosted on WordPress installations using the Formcraft plugin. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent. The file's structure and the nature of the linked URLs indicate it is designed to lure users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083c328e5fb5---44344804153.pdf In PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/29f192bef84b73d8bd8aadc346571d63/491239567.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/16775197362.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210705_2B331C05AE31CFCC.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/zaxegafoxonit.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f77ee08d3ef64e71238c18f61c954861/fexewokuzagafulumivesarun.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7698e0c3c---boxiwugen.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/vibineruvajokevikunimowug.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fd6d76856---94179519586.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/75ce2ffabb9fc9492bab519a0738a726/fokubosepekugibititalaje.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/24367616482.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/e6218b650bd59608192fc01d38802358/febipuxevinobazeteze.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8hqml8s21t6i1m8tts1omogh43/63454764978.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/poxurigijub.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45d0763e76---rixevep.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160968d33b03bb---balebepovupitinigazebuz.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ee877117dfc93da1aba5a2c51afa6258/zevusitorajud.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adee47da6ae---rapisuliwuburelufosifita.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160839a69b7c31---24387221604.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/96722287877.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/53722570546.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a48840b26dc---70448942264.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608797c72a02f---59810243343.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/poked.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=levels+at+which+strategy+operatesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 10772 bytes
SHA-256: 01b94aeca5204f88d380798149aeb6dfe3daab449fd948ee8cf3eb18ca95f27a
font_01_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 16344 bytes
SHA-256: ab6c89fd96c82192029d3d43896b7986a2b3bc4901ac0fc99b792a1fbb32c31e