Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e17da0c33676edc…

MALICIOUS

PDF

87.6 KB Created: 2021-02-27 22:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b5990cd72720e68d764c0698b75b64b4 SHA-1: 77d9fa29798edbf374ff21bb5773b605e32fda7e SHA-256: 5e17da0c33676edcc88402d0345c332c81c0a43b0bac8f9c07ea4c60bdb9fb42
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URI suggest a lure related to 'exam answers' to entice users to visit the external URL `https://maypoin.ru/wix?keyword=2020+acl%252Fnjcl+national+latin+exam+answers`. This URL is likely used for phishing or to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=2020+acl%252Fnjcl+national+latin+exam+answers PDF link annotation
    • https://cdn.sqhk.co/vuzefegevo/cGgiA4O/82233781354.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/TbjjKjh/89518404200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_60127a0ce52e5.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/Pvhiih0/japigogikibebawazesa.pdfIn PDF document text
    • http://linogozajasupe.22web.org/28048671254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_6030929fb407d.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
    • http://watuvul.epizy.com/jupum.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/river_basin_map_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/norton_antivirus_crack_version_free.pdfIn PDF document text
    • http://dajipuronepupoz.rf.gd/kixomedekonaboxeluwejul.pdfIn PDF document text
    • http://tunazafagid.epizy.com/kisuri.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/que_es_la_contabilidad_gubernamental_segun_autores.pdfIn PDF document text
    • http://toguzojokes.epizy.com/cuisinart_coffee_maker_grinder_jammed.pdfIn PDF document text
    • http://wowadepadon.rf.gd/pajopilusev.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/algebraic_fractions_worksheet_with_answers.pdfIn PDF document text
    • http://gefuxexo.epizy.com/tv_guide_listings_tonight_nyc.pdfIn PDF document text
    • http://jopiwutipav.epizy.com/math_addition_regrouping_worksheets_2nd_grade.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_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 5184 bytes
SHA-256: 875eb45a763d9d138dd02c6b8dafe8a67ccb2f7fe0840b5f4bf143cc80e1e746
font_01_sfnt_off00011ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC1 10504 bytes
SHA-256: 57cce5e8f2f8dbda3c9bbbbb28198bfa2d9fd2f0228d9b16cf708c972a33219f
font_02_sfnt_off000142b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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