Malicious PDF — malware analysis report

Static analysis result for SHA-256 035da038722a9879…

MALICIOUS

PDF

92.5 KB Created: 2021-03-10 17:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 366e8f537d3b7fe3cfbbc10f23e91b6d SHA-1: faa8e1149f30ed65cc2cdcfb342a3fa4f26423bd SHA-256: 035da038722a987952ea95a927db9af1aa9c6c7d2afd911ad942f80faa756454
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains a lure for a free textbook download, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, while many are benign, suggest the document is part of a distribution chain for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cdn.sqhk.co/xurakipigub/itiahA4/nulevurodabi.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fc99b841bb6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_6022c2f18b05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_602d4735d6db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_600a5bf3bbfd3.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/hehahfU/muscle_clicker_gym_game.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/crAjhge/31880929194.pdfIn PDF document text
    • https://cdn.sqhk.co/xasujuteguk/GhhDjhH/carve_the_pencil_game_online.pdfIn PDF document text
    • http://vobonenagixavus.66ghz.com/login_page_template_angular_4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=introductory+econometrics+a+modern+approach+7th+edition+pdf+free+downloadPDF link annotation
    • https://uploads.strikinglycdn.com/files/fc7cbca7-2d21-4d8a-94c3-b13b71dd126e/wunewevijazawifatazejaj.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/36864150176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25925d3d-5955-4f11-882b-30af3c78b867/clean_living_norfolk_carpet_cleaners_dereham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d7a0e1-39a7-480e-9818-8d4028c4862c/43101063013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28e0c82-a585-4a65-b70b-408a4f605f36/are_self_cleaning_litter_boxes_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12bfea1-2667-464a-ad02-e3196c8ee079/nitisifunogeturexi.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/cardinal_and_intermediate_directions_worksheet_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/81692916818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2708c7ff-49dd-41c5-98b8-0798106acc8a/how_to_read_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/saxon_math_course_2_7th_grade_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eceb7695-f599-486c-ba36-6b055603fc8d/10373086420.pdfIn PDF document text
    • http://jazifuz.epizy.com/calvary_temple_new_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf6101e-0ec0-44a9-b053-f435d76cd1a3/pafigarejegojefuxeparajaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7300d2e0-d3fe-4831-9862-48eb67fec6c0/prayers_to_prevent_death.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/gallstones_diet_sheet_nhs.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_off0001275e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 5604 bytes
SHA-256: e90e41df5a3b1720f77921e3b19fadaf6a52a5668158efc1c18c12f3d8aef3ad
font_01_sfnt_off00013a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A68 12324 bytes
SHA-256: 08e381068a917e143e188af62cdcd965d00fca1788f0743d22a1efe3b6c5ef8d

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