Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31b153d6c9f1ff3…

MALICIOUS

PDF

79.6 KB Created: 2021-06-08 18:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 576bc68823490ccb3b8ea62392443662 SHA-1: 6d03d1cda8e5fc6bfe94755172fb6ad05b19e76a SHA-256: a31b153d6c9f1ff3bad095bf1c91d5a199f6189908dc1b147e2e108878d3fff4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://wastran.ru/pbw?utm_term=wren+and+martin+high+school+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6060d8109084b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_602c3140f0658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_6053aa4c7793a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475715/normal_6007a161bb84b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fcaa6fc7f339.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_5ff3e0e0bf0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_603c2e6485341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/261372d8-4d06-4f03-a2a3-6ce0cda35886/teoria_de_las_inteligencias_multiples_educacion_infantil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16caa94c-ba60-4c05-8f35-b904601fceb6/ingenuity_swing_n_go_portable_swing_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e358ee7-eb91-4451-9446-59748e5c9d66/of_plymouth_plantation_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a630f1-1e8a-4710-ba69-4e78ebb21b3c/asus_m5a97_r2_0_bios_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9226943-4866-4a85-ba33-b737573bb051/ratizufajurufemivokar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f38a59b-2289-406f-be64-f7bb423fc089/class_8_maths_chapter_1_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8acbb2af-1baf-4c09-8c12-23a3808618ef/greeting_card_template_indesign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb600b9-e26b-4f44-af04-23ab151761e1/ford_6.0_diesel_turbo_replacement_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ba95d9-1ae5-4de0-9a99-1303e49ec31c/43849894774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8952adb1-2b7e-4146-8390-6232beaa5bcc/junie_b_jones_first_grader_one_man_band_summary.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 5412 bytes
SHA-256: 4299875b76594a1a8a1be3f64b247a1cd66f7df98dfe69ff7af8f6dacc3dbcdf
font_01_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 11020 bytes
SHA-256: 166fc0680e496e9af16e146ec4aa1330a85820583c217500543aed915515872b
font_03_sfnt_off0001220f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.