Malicious PDF — malware analysis report

Static analysis result for SHA-256 87463ab30f614907…

MALICIOUS

PDF

83.6 KB Created: 2021-03-26 18:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5e25f30dc0c333ce4926cdefcbd19b84 SHA-1: 5f2573f0f1fb94b92f4470ef064d11f3d3f4ce08 SHA-256: 87463ab30f614907ccff47308218ae3abaa67c30da16f490dbe43c963da9907f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when clicked, leads to a domain associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=body+exercises+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491673/normal_600274ecabb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5fd7dc08e8502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5ff80c600cdd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486742/normal_5fc9e7b641523.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://s3.amazonaws.com/zonivezada/vinofejip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffe1a86-97b6-4e80-85df-be9cfdda796d/fit_for_life_bay_city_tx.pdfIn PDF document text
    • http://delisomujiroma.epizy.com/90037251044.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/dufevasubulabiwapazani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878c6170-02c1-4e2e-966f-94f494087640/american_history_x_netflix_canada.pdfIn PDF document text
    • http://fatewazut.epizy.com/16023461315.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/tamil_to_english_dictionary_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f122ac4-6eaf-4035-a2a0-c5c0fe06c7a6/6609510840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f620688-9b66-4d72-a577-00b53e54412c/remington_14_limb_n_trim_electric_chainsaw_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/wiwibejuwedoxabidav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92bf8bd-b483-4422-b595-9fd45298644e/how_do_search_engines_work_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/crossbill_guides_loire_valley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5830cfa1-ea79-4125-8576-6ad17c4767eb/64920912874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8d955e-a4cf-41b4-880c-37f8860a6cfa/vazebisopijamavetonur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40423a17-7fbc-4342-817d-00b7592ee3d6/a_supposedly_fun_thing_ill_never_do_again_analysis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 4932 bytes
SHA-256: 43ba7de82c9f04c8762b00a44327c6a9049672e22b6565b88d7f6290a4f032f8
font_01_sfnt_off0001103f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103F 10296 bytes
SHA-256: 83b65f6e6930ee87a9087bcdc3ee4c779d1d033cd26a11886dc68be5022c9a4c
font_02_sfnt_off00013384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13384 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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