Malicious PDF — malware analysis report

Static analysis result for SHA-256 3472e75269f6e773…

MALICIOUS

PDF

81.8 KB Created: 2021-08-14 08:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cbdeee4dd80873628c19117d180576d7 SHA-1: face8dca3a74ccd3778c604bd2b848fe025753bf SHA-256: 3472e75269f6e77309de60ed5c25e2c543345550573ad18fd0cfbb7ff2b8ee29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were directly extracted, the embedded URLs suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4268

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 https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/da6d38df17017c08acebb29bd5eefe95/ketapod.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d876d95cc0---9048428358.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fca273241c9---12402772509.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/30461918386.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7d632330f11fdb385467c6c02dd5f2fb/39309069299.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/44469236708.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/53644056356.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160720af123bde---rudena.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/55520267565.pdfIn PDF document text
    • https://latework.cz/soubory/55134730862.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6fb163439---patisopa.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/c012b8f9840e5ef836cf2182b7869372/zowedefejigevezi.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/75077553051.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cb4e4e572---62398306554.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b721a4b59e0---juwokutadane.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/nalefuz.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/vurewonuvanum.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210607_FB6D8EE84AF5A4E0.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/07514184749c30d108edcb822707e69a/43310408901.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c22979591a---91717131999.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/53144883734.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/kivivu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/360fc0f0cba1dc249c95c425fe5d3f56/tazosesujedalotakejesofev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=manufacturing+processes+for+engineering+materials+solution+manual+pdfPDF 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_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 16280 bytes
SHA-256: ba569ef3bbad75237bf8fffcc38d1c28e074e6e9555acea2583032c59cbebcb5
font_01_sfnt_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001296a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296A 11056 bytes
SHA-256: 7b3241ac57a26ebed3898d7f28b5450de4088ca22cdfa6efea71c00c279a6d96

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