Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0438cf65e746cbc…

MALICIOUS

PDF

102.5 KB Created: 2021-03-29 10:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9094aaa31525cc5d443591bb001f618b SHA-1: 7229d00fbf288ff6227ab4a98cd000dc6f1e6ec9 SHA-256: e0438cf65e746cbc81f7045abeb391de6f290e65c55af68e4d9ff69fd38abfea
156 Risk Score

Malware Insights

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

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 0.9985

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.
  • 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://botokaw.ru/strik?utm_term=grounding+for+the+metaphysics+of+morals+section+2+summary PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0228cb02-496c-4e8d-ac90-4fe4f174ba37/xukewajonuxoxex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb703fd-e003-4b2f-ba22-737c6190e7d3/ludenedaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc95fc91-71b1-4a21-8f9e-d749fec22c54/18405715311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2506b57e-5666-4d7c-a717-dc2cd7238cac/infinix_note_7_price_in_nigeria_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639b330d-32be-483d-8256-b7af44538b65/persuasive_essay_examples_for_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bcf2c3-ef84-45cf-b2de-043fa2379cd0/conflict_resolution_examples_in_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a397d3-6bba-4c67-9ba0-44ccbaf6109e/2004_r6_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc795ba7-d7ce-4392-9340-dccb2798371e/91027623627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347955d2-d460-45a9-a6f3-71e0caa92eb6/romulesokexizizijufesosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf3f5fc-9249-4ae5-85b8-9f282f04697a/ejercicios_resueltos_matematicas_3_eso_operaciones_combinadas_fracciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70aee60-93b1-4976-be45-b1d92de89e46/what_are_the_different_safety_practices_in_keeping_the_workplace_safe.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_4be0024e1c9f442ea636d5049456f5a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cee0206-63ce-428b-9e45-9574609ce869/what_types_of_intermolecular_forces_are_present_in_liquid_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e698ee-97f4-467e-8c02-1063d67d24e5/84849495219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d837de9-2d57-4a3f-95ba-597704b021c6/61548599571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a502f7c3-f0b3-4552-8e19-b33ffb9aaf8f/beats_solo_2_wireless_reset_not_working.pdfIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_1b8a58cbe3af449288b43ff228f9514d.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_b59d82a5fdcf48b89b5fd72e58e1d318.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_6a2c4dd10af349c1b9fdece2a8a45731.pdf?index=trueIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_03da1b9990e44912ba1ad415c55a60b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9464c2-6848-40a6-ab5c-8a95e0f8ce2f/g_shock_ga100cm-5a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2092af8-fa4c-45b2-a4d8-8d94edb4fa4e/the_expanse_season_5_episode_5_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3371ff2d-c429-478b-bb09-4f024c8b7f8f/champion_generator_repair_shops.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F01 5832 bytes
SHA-256: a7708f5202fb3e8a3912e8b3c93534d4dd7adee91d6fa6b41c20dc2514b3db9a
font_01_sfnt_off000162c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C3 11488 bytes
SHA-256: 9547099220bfc959bad3f5b7464972bb9b15ef9160a84d73482443a93ecb0199