Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26b9ae5cb7bdddf…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 21:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2d83a539df719fc58a669e12fde7a9 SHA-1: e1fdcfc412c017cb27ca1c3d2f29b72bf505eeb0 SHA-256: b26b9ae5cb7bdddff3767082eef0b426745f5b79b86bb3aa36ad435abf474520
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is directly referenced in the heuristic findings, suggesting an attempt to redirect the user to a malicious website. The document body, though heavily obfuscated, appears to contain keywords related to classification and PDF metadata, likely serving as a lure.

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://leonvi.ru/award?keyword=klasifikasi+biota+laut+pdf
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/dafad.pdf
    • http://nubolats.xyz/why_is_my_vizio_blurrytm03e.pdf
    • https://risixugetiso.weebly.com/uploads/1/3/5/3/135317557/tunugijoxagiz.pdf
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/5abb2028d1a0fdb.pdf
    • http://cetakchantek.com/sintomas_de_alcalosis_metabolicas057g.pdf
    • http://banki-internetowe.com/garmin_vivofit_jr_2_discountck8js.pdf
    • https://tikiruwilowu.weebly.com/uploads/1/3/1/1/131163793/wududagit.pdf
    • http://bottlechainworld.com/que_es_un_producto_artesanal_ejemplosezq7b.pdf
    • http://effektzhizni.ru/what_is_the_dominant_structure_used_in_narrative_text8np9t.pdf
    • http://dreabling.online/william_shakespeare_sonnet_106_analysiskypv8.pdf
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/4279da1.pdf
    • http://italystore.pro/when_to_use_imperfetto_and_passato_prossimo4pe0r.pdf
    • http://www-sfr-fr-monespace.com/que_es_el_derecho_romano_vulgar_conceptoq8vov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fakuguvil/what_is_cyber_essentials_plus_certification.pdf
    • http://wudezila.epizy.com/what_are_3_stressors.pdf
    • https://s3.amazonaws.com/limepusotanal/anjali_ke_song_video.pdf
    • http://pewusufep.epizy.com/laxijevodozepa.pdf
    • https://uploads.strikinglycdn.com/files/1576275e-6a41-47e2-bf0e-91712cfcb1e1/wakadavuwef.pdf
    • https://uploads.strikinglycdn.com/files/bfa6d0e0-8d0d-46b3-899c-708f92561880/adobe_photoshop_cc_books_free_download.pdf
    • https://uploads.strikinglycdn.com/files/3f892aa7-0fde-46f1-b029-ebc644104efb/tarot_card_spreads_for_self.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/bollywood_instrumental_song_zip_file.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6f.bin
131faddc1ec92709ab8443971514c2b6962ee707250b69f4ad486be5e3dcd1db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 5112 bytes
font_01_sfnt_off00010ee2.bin
9f6a95f294d0914d00cae9ca880ba314f71efeeba09cab6e00a9b60bf40762ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 10356 bytes

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