Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ce825f7d284e8a…

MALICIOUS

PDF

77.6 KB Created: 2021-09-06 13:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5705dc573392a694c92edf11e304e54e SHA-1: 11f516c417a1008c5203a8e64f9f4ececfd2b6e7 SHA-256: e5ce825f7d284e8acf5be8865327dcc411c85ef470f3c412ff1614077d0dffaf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely intended to lure users to malicious content or phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially leverage SEO tactics for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7116

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 https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/8c5a7ioir4hklkj5ds1bi1pbe8/21405754405.pdf In PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d3dbc7b6204748db65267eef3663a5af/47786209369.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/lutajerefadipuxi.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/53566019443.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/a4c97947a10db6ccc6d9f361fdd380e5/90761938629.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/11410804283.pdfIn PDF document text
    • http://absigorta.come/file/86101797423.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/padenidito.pdfIn PDF document text
    • http://skisun.it/userfiles/files/wuxosaruv.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e45acf06---vaserezisu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/34170a52fbffd264907efc5080b174d0/bepiketudidim.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ccdd13360---95334617761.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/fabukifamupe.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8d6572edffaacc30c36a170d3321ea57/27152104510.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/b6007bae99d8845b8967292be818905d/piban.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfa49b8ecb---34089006772.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/15718576072.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/rarilekogekozut.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/75931046606.pdfIn PDF document text
    • http://elitvorota.ru/f/file/41003332854.pdfIn PDF document text
    • https://topplene.com/upload/ckfinder_temp/files/20210609141535.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/vikinabozivo.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921fbbd476f---bipekavawolefegixuwewibor.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/e165e156d301fff8fbb80f149be5ef7a/40808494164.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/62a712c56a6535296e145d243cb69284/26420468523.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/ropikufoku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=prashna+upanishad+pdf+in+tamilPDF 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_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 10612 bytes
SHA-256: 69562784bddb26fcc69908d3524bd378531f6fc2a4190da316e2a3e88231206d
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 23060 bytes
SHA-256: 3c3a8b6bfadfeef71910028d24d8daf1b619116c84a7267ea5022aae2c759fb1