Malicious PDF — malware analysis report

Static analysis result for SHA-256 102d155ac0c44088…

MALICIOUS

PDF

74.8 KB Created: 2021-08-10 23:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d709facda9279dfcb81f0ed09ebd80dd SHA-1: 94d9dbbcb7de54605914210c31938edf4db4ffaa SHA-256: 102d155ac0c4408869e872608e162407080f969bcbcdfaf6558ba921436afbba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to distribute phishing content or malware. The PDF structure and embedded links suggest an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6282

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://ketchas.ru/uplcv?utm_term=what+is+mttr+and+mtbf+pdf PDF link annotation
    • https://fibaquitaine.fr/cebatrama/userfiles/files/juludobeserufurufa.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff0417b7dc92f9c2df3f727bf48041a5/denetidipabisi.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/a4fjj17qkud2lih8gguk1obhl3/zogujiwegetupunadot.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/97913500445.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fdf407898---bulajusu.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5574232452---goriseravonowinakogubobu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbfa6a445a---78626776179.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/76272425287.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88237657730.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607adfa77c79b---17926669511.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/zejebemozexagunefowikom.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e6a7e8cba277c5820556480a6ee5c3d7/liputuv.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/36308636896.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dca76cabe---madeponuseburob.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/85fc3976db794941db9708a3b1d51317/1683197424.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/71810781118.pdfIn PDF document text
    • http://dade666.com/userfiles/202106file/2021062821342070554.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/90706877627.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/sewulerepuditajisawo.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/51552dc93f27e05ceba962be502a3fe3/53091231453.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa6d381801---63916306889.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/48106734253.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c6213c7fea2ef2d450414afdf7185daa/sedegamenak.pdfIn PDF document text
    • https://numberonerevolution.it/file/bezedudikejijevofoj.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/74152462578.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/95508555955.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 10596 bytes
SHA-256: 97d8d32f97ef7e1f3c4a965993d259b9ddebefa57dd344648b6c933ee3850849