Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31566372b01bbce…

MALICIOUS

PDF

81.5 KB Created: 2020-11-20 10:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ef92a7f48c462eb945715ac702d6eee8 SHA-1: 126a4acb866a15f4573ed0403c9668b9e2a1ae06 SHA-256: e31566372b01bbce104c34b8fdccc919b794fe2ac68f6ca58260114ebf2cfd14
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for 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 heuristic suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://trafffi.ru/aws?utm_term=liberation+war+of+bangladesh+pdf PDF link annotation
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/1624136.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/360332.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/3e3418.pdfIn PDF document text
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/tufagugep_kijimutoxoz_zivobitazijexu_gorixe.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/830c71f9-7f3d-403c-a328-16f3531d73c3/31897108676.pdfIn PDF document text
    • https://s3.amazonaws.com/lirivugu/kanivabig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edccfe1c-0b52-4f4e-9538-3c3f991a456e/nerufozedibuzukesemagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537a6af5-5598-4740-859c-8e89f5077711/93068784919.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/demowitabazenubivi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/multiplayer_games_unblocked_76.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/rooftop_snipers_unblocked_77.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/multiplication_worksheets_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e02c96e-8fc8-45eb-9e0b-1fa5f53ee73c/nakusamurenutepivovodu.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/zuvobiburibikidubof.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/download_diary_of_a_wimpy_kid_books_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f40b730-310e-4454-852b-fc3d331c0d5b/bonoxutilaxilonoko.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_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 5476 bytes
SHA-256: d1e2ce35054c674afc4d8d3804825629e4f71b1d72b8d03631691dfe7a3a3c5a
font_01_sfnt_off000116a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A7 10144 bytes
SHA-256: f7b69e2fda35f4cae5bcfd7545fe44a67dd0b9700a6a32f2a389d4a7d22bdec7

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