Malicious PDF — malware analysis report

Static analysis result for SHA-256 5454c17dd954b9ad…

MALICIOUS

PDF

132.0 KB Created: 2021-07-21 21:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aefbcc5044798543170a3883339339ca SHA-1: fc276fb50e277cc43de6f35c39014e95b12f47dd SHA-256: 5454c17dd954b9add2aa92f8dcd8dabfcbc110a09ec09dc9cd05913906c33924
124 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress upload directories. This suggests the file is designed to act as a link farm, potentially for phishing or distributing further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.1873

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://skyline1968.com/clients/74864/File/35528997358.pdf In PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/39717579405.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/95808225056.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc7e32a49a---82729687688.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/939e8314d5e0a797a08fa2a9e764689a/42134911969.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/353370987d223dd475d2d8ade458824a/nufiwuvitavabedaduxin.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/laguxaz.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb7a76b390---buwubavirerinopawunop.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/95481690848.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/830f011c68f2bad2606b6ae9a23f6f05/61605903303.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d220e522375---julufetufesuwila.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/vusalimeluzuzoxewu.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/es6oni52c3rf7gufkbc0jt1c7v/xamotezureve.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/6fc5a9609b8b772553bbf9093216a7d2/saxebivuroxafusixemoj.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/49806635284.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/32530134245.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7906ebda9---wesafijomuwurem.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/0r7jnou5gfqko9o2u6bokkdsvc/rewonugufa.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/sixudu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607df842aefb0---mozezaf.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924539dc241---lozunezazixob.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/21095861966.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07180873c---26927410754.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/lujag.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5bfa0595a---80178295073.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/vadanerewetegum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=powers+of+numbers+chartPDF 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_off0001b7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7F3 23988 bytes
SHA-256: 1acebba377ba39774765ef67e1f464f9aef62bb3b6251315e3d89d989afd01c9
font_01_sfnt_off0001f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F69F 10788 bytes
SHA-256: f554a0396f583e78f815932f3455a4a7b1c248505d9d36fc98480f9f8ef186f6