Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ebc24377c5e5e7…

MALICIOUS

PDF

86.5 KB Created: 2021-04-02 20:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73a9fba89b39234a9c3ca98e2ff46b6a SHA-1: dc7274ee027e6558b35b9d9221656f5aa3dda2ab SHA-256: 10ebc24377c5e5e7b086b3aa5fae8e083689fd755dafecd596ad6d053034dec1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm or SEO manipulation scheme. The primary IOC is the external URL pointing to a potentially malicious domain, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://vilenefex.ru/strik?utm_term=italo+calvino+cosmicomics+quotes
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/8938766.pdf
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/ffd6be9d8cb4171.pdf
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/sosiwubosor_wakezatut_kaduseninumuzi_xaline.pdf
    • http://lalashoppen.online/82571619283h5nls.pdf
    • http://sizuxofutitarax.mypressonline.com/banking_system_project_documentation.pdf
    • http://gosunenibunale.getenjoyment.net/mini_international_neuropsychiatric_interview_franais.pdf
    • http://plsale.pro/booth_algorithm_for_multiplicationu81c0.pdf
    • https://xomikevogonenoj.weebly.com/uploads/1/3/4/7/134743799/wubezoginezojix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9f33ca8c-0952-4048-93a7-202c0bf72b0e/what_are_the_different_types_of_health_information_systems.pdf
    • https://uploads.strikinglycdn.com/files/04428d90-ef9f-443d-95d8-901190588df8/46252470758.pdf
    • https://uploads.strikinglycdn.com/files/9e65ee98-2fa4-470e-b365-925d2af180e1/ambir_scanner_calibration_sheet_print.pdf
    • http://vidilig.onlinewebshop.net/advances_in_landscape_architecture.pdf
    • https://uploads.strikinglycdn.com/files/8a653d2a-f3ba-4f34-9cb6-c5fefe4d53b4/2005_honda_trx_350_oil_capacity.pdf
    • http://bogalibamadom.myartsonline.com/12925552658.pdf
    • https://uploads.strikinglycdn.com/files/1cb3aba9-bc9c-4496-bec0-a5a06714c428/mr_coffee_coffee_grinder_parts.pdf
    • https://uploads.strikinglycdn.com/files/f97b4af8-e0b7-4d41-8883-d8757b3290e4/autocad_2013_3d_modeling_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/b3a4c212-2efc-4e61-8265-0425a28ad57c/duxesupolozije.pdf
    • https://uploads.strikinglycdn.com/files/a7494cff-4140-45e2-8e0f-34f73803667d/how_often_does_google_maps_update_their_street_view.pdf
    • https://s3.amazonaws.com/saziwijaxodav/best_selling_personal_development_books_2020.pdf
    • https://s3.amazonaws.com/xenavuxa/85642796075.pdf
    • https://uploads.strikinglycdn.com/files/f37c4f77-3827-4704-8429-b86a2a5b7085/what_is_bretman_rock_real_name.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010735.bin
26b491c274fd3e14e9da4a627053e0af549d70408ccc8baf77dfe3b61d3fbfae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 4856 bytes
font_01_sfnt_off000117a5.bin
52fd4677b743f1d028bc8c7f361661ff4a1be8782f4554c4dbf1c805aaf57968		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 11068 bytes
font_02_sfnt_off00013cac.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAC 4324 bytes

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