Malicious PDF — malware analysis report

Static analysis result for SHA-256 18974d3df0152e19…

MALICIOUS

PDF

63.9 KB Created: 2021-06-07 09:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be3c8ca4932ce958563e040d09c77939 SHA-1: 19dce997fc1e3e261c47319c2f40c382a51f7484 SHA-256: 18974d3df0152e192313873344d8e0926f30d4ac1f1e528956d0f49658ee72e4
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://queure.ru/pbw?utm_term=exerc%25C3%25ADcios+sobre+pronomes+interrogativos+em+ingl%25C3%25AAs+com+gabarito PDF link annotation
    • https://tewetakejuduz.weebly.com/uploads/1/3/2/7/132740850/vunat.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/nanakox.pdfIn PDF document text
    • https://xugowumilivave.weebly.com/uploads/1/3/4/8/134846580/tetokikaj.pdfIn PDF document text
    • https://vubufixul.weebly.com/uploads/1/3/4/7/134708570/8440064.pdfIn PDF document text
    • https://venatijaw.weebly.com/uploads/1/3/4/6/134680547/183f44ef3.pdfIn PDF document text
    • https://mutevoleronuxo.weebly.com/uploads/1/3/5/3/135351112/kitogu.pdfIn PDF document text
    • https://wejorawifaloju.weebly.com/uploads/1/3/4/4/134458418/8f4487267cd.pdfIn PDF document text
    • https://boziwigezuzes.weebly.com/uploads/1/3/5/9/135984517/1d5ed15bf38f.pdfIn PDF document text
    • https://vifunufuwo.weebly.com/uploads/1/3/4/5/134596702/7873497.pdfIn PDF document text
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/3ea379e141.pdfIn PDF document text
    • https://xovatofenutadom.weebly.com/uploads/1/3/4/5/134511467/bolozoxigenod_xoguwolirezev_faxoripikufenat.pdfIn PDF document text
    • https://nesaresivegixan.weebly.com/uploads/1/3/1/4/131453215/ponijosewifiroripilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb26a9c-0ad9-4893-966a-94d12a002d3f/bissell_proheat_2x_revolution_pet_pro_1964_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f2ad82-2a0c-414f-bff8-f9bcc4eb65f6/best_logo_design_software_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7597601c-28c9-4312-8d92-ddd2637f1b19/the_brain_warriors_way.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309c5de4-901a-4bcd-a4dc-cdd293d9e247/how_much_does_it_cost_to_book_life_in_the_uk_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fad5b5-013b-4f43-9f65-a3aa216ac8a5/jodisodufagafesimakadota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e067fbbd-7a7e-4bc6-844b-bad6c67a3855/renebovud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516bc6d0-e616-4864-b675-17dd61b09daa/wutuzola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960b61ff-c25f-4433-967b-31464772d9af/marques_de_sade_livros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e68c0a-a947-422a-819f-42ca4083ca90/62599617821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4be3ae6-715c-4827-9630-399a14b7cd5f/67655937145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f726a117-1d77-4b1b-808f-fc273fb861cd/dolabomufolunori.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68E 5680 bytes
SHA-256: 967753aac58fdf55c3be9580b85e023bdf7996c1a206b2fd23e93e9b50505608