Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5e90cdcc683409…

MALICIOUS

PDF

94.3 KB Created: 2021-09-24 05:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0ac404a3c4061b8df1104e51207cbc97 SHA-1: f90d83984d6359810da04aab4961ba30ddd55cb0 SHA-256: aa5e90cdcc6834093929a308c82ab467c5a7071f1efa9a54956d10f2ff2a9e65
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. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.1093

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://carrozzeriabosini.net/userfiles/files/80573631809.pdf In PDF document text
    • https://khabul.mn/mmpa/userfiles/files/79559898838.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d123ceb7c---90771770963.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/11354190250.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/6659779893.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/24923095509.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/94996914221.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/mirqqcq2vjosh96v7gn4ncpgqt/81816912911.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/c7862845e9bf1fc15169539b2451a96a/60097750307.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/pagelepuxofebejoleworugip.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/54081073946.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/77852469607.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/lonafowikubi.pdfIn PDF document text
    • http://dogwarts.ru/sites/default/files/file/desedagoteloxogonunevuri.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/6728767237.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210924052733.pdfIn PDF document text
    • https://wittnebel.dk/file/6862431788.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132f1041f2ec---donugowurasubodapubutuxal.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/mukomezawotobuxokaw.pdfIn PDF document text
    • http://mps-india.com/userfiles/files/budasebijexumumapageju.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/45293804915.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/rolefojulizepijodegebupe.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/47704339579.pdfIn PDF document text
    • http://yanartextil.com/firma/files/nokozir.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614d2f91cd908---36094082345.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/47745022020.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/tinemimoduvaluxememuge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=watch+game+of+thrones+series+1PDF 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_off0001310d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310D 10780 bytes
SHA-256: 1c1c7bbc3dcc0667976626f9fcbcbb89aeeb2798ddf02db78a81b8837e0ab3df
font_01_sfnt_off000149d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1