Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c48df4bbdd97d16…

MALICIOUS

PDF

83.9 KB Created: 2021-07-20 18:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e7aab6b410d79a74861f1531413f7ee SHA-1: e7601ca7d39a0bb5926ac87df3b8f5e905cbd2d4 SHA-256: 6c48df4bbdd97d16a8fb2c2a3cddd695c85da3c1dc5abf870c9d4d0627fddfdb
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://otoozevran.com/resimler/files/nubagudipununasizajaxu.pdf In PDF document text
    • http://younewstoday.com/task/userimages/file/22445144269.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f61416c91---kejewemevusut.pdfIn PDF document text
    • http://kbchina.de/upload/lolupufelufowirujezadenow.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/01733adb9c93c0753db0dfd03445e6fa/31783727235.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/65390132926.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/v906kc4k40q0un7l76efpdsqnu/livaladugagiwizulof.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/20c481b43d8fabdeb63fe720226156ce/lotafakebopajaro.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/waworimifogokukegulat.pdfIn PDF document text
    • http://accronline.com/userfiles/file/mizowobonasozibagu.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/edf7a9b3f66b2459dfd0763afd093df9/juwag.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/44570399443.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/tuwozuliwaf.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089cb6d09b28---91578448730.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/1fe66dc8d1f26bbb14fa3ef3a7c9a957/pagaron.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/h6lib9bi98apvs3i84de06obmi/2198708700.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1584b3d5f4b82acb6e2627fc2b4021f3/85008679126.pdfIn PDF document text
    • http://fotossc.pl/_files/file/19365417678.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/57388065557.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f4fae54351c---zikurozubebaneminilitedi.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///88351001105.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/sufuwadupiwibixupij.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607e40db94775---3524425348.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/5k7utkg0d5tgeqcr0vekjn61r3/dakefugeravojumakuz.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/robuxegeligu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=colloportus+hogwarts+mysteryPDF 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_off00010619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 17748 bytes
SHA-256: b7f3c25791db1e1f7dc24b71aa356a33ec60cc91f69304433086aa4a5fbdcc37
font_01_sfnt_off00013319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1