Malicious PDF — malware analysis report

Static analysis result for SHA-256 282fcd33597bf543…

MALICIOUS

PDF

79.8 KB Created: 2021-09-17 13:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4f6188f86bf389b815cd18c623752add SHA-1: 1057c524f5196d7896c61f5afca8853a566fcbbf SHA-256: 282fcd33597bf5432807719c3fdad7bf0bc2b25e049e4c83c8e70f65123cce9a
124 Risk Score

Malware Insights

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

The sample is a PDF file identified by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress upload directories or appear to be on disposable domains, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and link farm characteristics strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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 http://itcbeautytrainingschool.com/userfiles/file/wufosepijujepepo.pdf In PDF document text
    • http://leruichem.com/upload/files/dusalafesiwe.pdfIn PDF document text
    • https://ms2oke.com/contents/files/8252811099.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/jebib.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161396e208537c---tilamowitotezunugogowa.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/4286483768.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/78012940331.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/pumili.pdfIn PDF document text
    • http://xsteelstock.com/d/files/66234272458.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/62343492616.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/fukuzabosigidexato.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dumejibemisuzejukej.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/zejorogeviribakotujera.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/9164523780.pdfIn PDF document text
    • http://mestan.by/images/file/rotupepexiboxarulukudaw.pdfIn PDF document text
    • http://renknh.com/ckupload/files/lezeboxev.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/18472065829.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/7425661500.pdfIn PDF document text
    • http://rld-carbon.ru/file/turajelikase.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/gutaxarojoga.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f31e09cbdc980956b3b5e0e867097ebe/folelajafadenovisadikux.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/taletojisotetovupenuxew.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/6dqk3d6b2304tim9stn55gotls/47607289781.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/pasatonaxaropo.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/27772828246.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=watch+series+and+movies+onlinePDF 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_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 17520 bytes
SHA-256: 4fbc4a5592689a7ee7be9cee8baab18d864e964eb78d1d77734a12188c052491