Malicious PDF — malware analysis report

Static analysis result for SHA-256 0574a89320227865…

MALICIOUS

PDF

74.6 KB Created: 2021-06-06 04:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8c8a16b741324d10763cae583707987f SHA-1: 84da3af0f5170cdd888889fe6cfe3ec8f3e479c6 SHA-256: 0574a8932022786546611e21ff2e0e27af1d97d7ab9a0a96d1ae75c97fe04008
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier indicate a high probability of malicious intent, specifically phishing. The embedded URL and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8120

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://allytemp.ru/pbw?utm_term=how+to+connect+harman+kardon+bluetooth+speaker+to+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504922/normal_602d6bf368841.pdfIn PDF document text
    • https://fubagodesipura.weebly.com/uploads/1/3/4/3/134326772/f17e5cc5c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4380078/normal_60affb608647f.pdfIn PDF document text
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/zelekeserow_wisozikuliv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_6061387bcba5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_6058dff9c3d69.pdfIn PDF document text
    • https://farerobizu.weebly.com/uploads/1/3/7/5/137500523/5100518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_60b912eec616a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d2b6b8767.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/492142994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_602bedf0beb4f.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/e1d14e76-ccd4-4fd0-bbcc-2f03f7e6ec11/how_to_trade_forex_online_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e522d906-eb34-425d-b7f7-1644e211c1ea/how_to_find_someone_car_number_plate.pdfIn PDF document text
    • http://jizakatum.pbworks.com/w/file/fetch/144650502/36335669590.pdfIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144438297/guxiluxipixuropefaxed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8888fe-1cbc-41b8-bc04-2366e6dfdaee/descargar_mi_planta_de_naranja_lima_libro_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027f90c9-b249-4c38-80b7-0248e34a6e7c/are_spotted_lanternflies_dangerous_to_dogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbd0eb8-9a89-4c2a-b1cd-1ec4cf59e0b8/92467418353.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144440976/padma_puranam_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ac0919-513d-4d8e-977c-e35ffeadb974/greek_god_names_and_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81316b8-c3fc-4c36-9c5d-dfaa33f6d24c/nikon_d40_price_in_india_2019.pdfIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144544335/cost_of_post_nuptial_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6b1569-f6b4-4ed7-ac48-403ac26c0566/delonghi_nespresso_lattissima_touch_coffee_machine_manual.pdfIn PDF document text
    • http://buxozodevoge.pbworks.com/w/file/fetch/144613698/celebrad_a_cristo_acordes_torre_fuerte.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_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 5628 bytes
SHA-256: 961e9aab280b432254c8aedd3229a0605c2984cc42eba608a0af3279ee888de7