Malicious PDF — malware analysis report

Static analysis result for SHA-256 931b03b2d640b176…

MALICIOUS

PDF

86.2 KB Created: 2021-05-28 16:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7a03d8a07b4568b5920a93d2c7a2f057 SHA-1: 411a4b98b99f525c718fe9c0021316b8dca28f8c SHA-256: 931b03b2d640b1760e4ce6958321fff90d421d3d22a0158eeea07fdbab851df1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, appears to be related to search engine optimization (SEO) tactics, suggesting an attempt to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://midufefew.ru/strik?utm_term=what+is+the+mdmp+process PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369141/normal_605c12ec21ff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_6010ffe85b60a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_602088ea3aaa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_6045f85388887.pdfIn PDF document text
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/xevof-pewenexeb-xutimaloseliz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_603fa71780525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_5ff4f8e193541.pdfIn PDF document text
    • https://nozezezolakufu.weebly.com/uploads/1/3/2/6/132695232/nukumevakevubawetun.pdfIn PDF document text
    • https://suzujiwome.weebly.com/uploads/1/3/0/7/130776055/9e83fb7a0.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/0da9c72d-2b1c-49d9-8bea-5e2972104f00/dell_optiplex_7010_drivers_universal_serial_bus_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/658e04f9-be27-4617-87e0-bb7cb043bc36/adobe_photoshop_cs5_crack_dll_files_64bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59169c6-b540-4291-92ef-176fdfd46163/1992_toyota_pickup_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d739fce-724a-462f-b601-b977f9dceba6/volume_of_cones_worksheet_kuta_software_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab62d29-1ba3-4f58-b91a-0af7807ba6ef/all_clad_slow_cooker_parts_rubber_feet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553b4a45-b859-4f50-8497-458bcd36dba3/conectar_ventilador_de_techo_sin_luz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507578bf-14db-4231-a5e3-62fcf755f695/how_to_prepare_data_interpretation_for_bank_exams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8548b0-88e4-418c-85fa-0917dee09387/rolekupewofog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3115c7-dd1f-4637-9699-4e3f0f1f13ac/how_to_download_gta_v_without_license_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33c684e-fa1e-4575-bc1f-cc5394c9e1a7/cricket_scorecard_sheet_format.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_off000112c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C2 5296 bytes
SHA-256: 8defdc1fc7bd020f3faec431065fd21fcac42385cc576c653c58c15fa287e280
font_01_sfnt_off000124a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A3 11436 bytes
SHA-256: 1b04e2a44a0eedd277efa9a3c2d6d001e154920fe5a93ae01f31dba8be912c2c

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