Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6bc744827d7cc5…

MALICIOUS

PDF

81.8 KB Created: 2021-08-18 06:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d9e59cf6b4de22368eff0382e063967 SHA-1: 9ae33eee8fba9c92c4ecde789bfbc771ee5c9def SHA-256: 7c6bc744827d7cc516a98511939096625fd08f01c6b82eb2cc8c239339fe9b24
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to lure users to malicious content. The presence of multiple unknown URLs and the compromised CMS upload links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2535

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087c6191fdd6---21520227503.pdf In PDF document text
    • http://cpgny.com/userfiles/files/53952419143.pdfIn PDF document text
    • https://fasaac.org/temp//files/21960577818.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/pasupumugitijupasax.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119a7989fb7f---vafepatijuxobuwurosi.pdfIn PDF document text
    • http://evola.it/userfiles/files/24826722855.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4db9e68834f1d9289e526daf42076689/44279149703.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb4e888550---65024909798.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/tanudoxiwezox.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/3a3d833613b4499b382bcb67c0fd4318/22890839299.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091304597ff0---64065602719.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/65716448322.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/19442484137.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/1660581337.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/77548351987.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/8304f8cd547e0f424691ee352a02cf9d/fatexuzobononujuz.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ed22e4b621565b6f70fa1303a989975b/92967144078.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877dffd1aba---3531537356.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/38c8e77ab2cd3ab53122313c64e16d2e/94687070616.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b61e3178c4ec3e86aea0f35fb470015/wikazotipejugifolane.pdfIn PDF document text
    • http://hasyo.net/files/file/70018213677.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/013959d46970749a57c00eb79fe13dad/48847136538.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/30474296704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+mercedes+pre+safe+systemPDF link annotation
    • 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_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 10724 bytes
SHA-256: 96d12e734fbc8bbf8f856c67d665c82045c43f9d55589c2cdd4962ada7ed01d6
font_01_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 16896 bytes
SHA-256: 3e02390d9ccaf184d6478a7defc4c860813aa6eecceeaf4cd62e9a5b81dc9a52
font_02_sfnt_off00012b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1