Malicious PDF — malware analysis report

Static analysis result for SHA-256 4928023c00e07ebe…

MALICIOUS

PDF

78.4 KB Created: 2021-03-18 11:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8a9c5617c35bcb595ebf8e63f934a8 SHA-1: 56c8b46551001fd3c5887b4ae8f815180d1897da SHA-256: 4928023c00e07ebef50a88beb181f485fba52d682bff7bbd6635062b4144b3a8
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs, such as 'https://nipisod.ru/123?utm_term=gate+2018+syllabus+for+electrical+engineering+pdf', suggest a phishing or malware distribution lure, masquerading as a syllabus. The presence of external URIs and the overall detection profile point towards a spearphishing attachment attack pattern, likely designed to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=gate+2018+syllabus+for+electrical+engineering+pdf
    • https://lemoxubasox.weebly.com/uploads/1/3/4/3/134329143/putawugu.pdf
    • http://vomimaforotagi.mywebcommunity.org/what_does_af_mean_on_my_maytag_dryer.pdf
    • http://jusegoma.22web.org/92204764577.pdf
    • https://cdn-cms.f-static.net/uploads/4375207/normal_604426c2b84ca.pdf
    • https://vorajazelilax.weebly.com/uploads/1/3/1/4/131407498/7913063.pdf
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fff7bfd79e8f.pdf
    • https://cdn-cms.f-static.net/uploads/4467017/normal_601d9f598e4cd.pdf
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5fdf0230b8bfc.pdf
    • https://ziralupaw.weebly.com/uploads/1/3/1/3/131379221/8308353.pdf
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/8ac4f16eccd1d.pdf
    • https://cdn-cms.f-static.net/uploads/4410462/normal_604e98b312de5.pdf
    • http://wopudidadufi.22web.org/bewadopu.pdf
    • https://gaxurorilapuw.weebly.com/uploads/1/3/2/3/132302857/malejafe_zodub_molafotig.pdf
    • https://wigikezidewuti.weebly.com/uploads/1/3/4/5/134578964/nimuxoraxowuvaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vapodizasogore.epizy.com/90436793726.pdf
    • http://magajavopisili.epizy.com/22070037207.pdf
    • http://pifetipopazemex.rf.gd/pojojulosijimubezezukol.pdf
    • http://diturasenupope.epizy.com/what_are_the_best_pokemon_booster_boxes.pdf
    • http://lexireto.epizy.com/best_free_article_spinner_software.pdf
    • http://dudakesiburegig.rf.gd/capes_minecraft_pe.pdf
    • http://gizogebinide.rf.gd/guidelines_peripartum_cardiomyopathy.pdf
    • http://gototura.myartsonline.com/penibofasemezajufoge.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_off0000f08b.bin
9970e4b320c2234a907aad08b0afc6581f3692c22408dd1994ac342cfa14d6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 6116 bytes
font_01_sfnt_off00010573.bin
7c549234d72d600a1ec1504cde14096a3c543e10528f49657e4975af7b07aa85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 11276 bytes

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