Malicious PDF — malware analysis report

Static analysis result for SHA-256 8290c5baaa7b8ad2…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 10:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d38da303ed27b3361ebfaa57530d1d9 SHA-1: 495b468e1834dfc8030b1f2696f9f8fe12a2a41b SHA-256: 8290c5baaa7b8ad26deb4e0e2fb6efc8f7f084c4881e693d920778965ddd66f9
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for a blockchain tutorial, likely intended to trick users into downloading further malicious content or revealing sensitive information. The PDF structure itself is also flagged for suspicious object handling.

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://golowaki.ru/award?keyword=blockchain+python+tutorial+pdf
    • http://siwivelijutore.medianewsonline.com/benen.pdf
    • http://letuxegesilem.iblogger.org/komaluzedumozererib.pdf
    • http://instapriz24.online/la_divina_comedia_resumen_corto_para_niosuasd8.pdf
    • https://cdn.sqhk.co/juvebuzizej/hgjgfgd/3127914712.pdf
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/vakofek-guwuz-bebasa-zujojanimuwam.pdf
    • http://jofifuneku.medianewsonline.com/43973301281.pdf
    • http://generatorsale.ru/one_call_away_meaning_in_tamilbc1oz.pdf
    • http://tesugujinarijag.mywebcommunity.org/sezuwitoti.pdf
    • https://novunafa.weebly.com/uploads/1/3/1/3/131379228/barifot.pdf
    • https://fujifarilopo.weebly.com/uploads/1/3/4/4/134483008/e0a757ab3.pdf
    • http://nasporte1.fun/vegan_keto_diet_planiv4cr.pdf
    • https://jamojibo.weebly.com/uploads/1/3/5/3/135349767/bigelatikufafaje.pdf
    • https://cdn.sqhk.co/xenojepezere/ichiOHB/befozosezibekebutoxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xojesenokok.epizy.com/38969627569.pdf
    • http://xobeminal.atwebpages.com/honda_inverter_eu2200i_recall.pdf
    • http://dizakopalelur.epizy.com/character_description_worksheet_nz.pdf
    • http://vuzelupuz.rf.gd/38357635209.pdf
    • https://uploads.strikinglycdn.com/files/19979066-bfc7-4366-b2ae-d189f6d41eae/what_is_the_tyndale_bible.pdf
    • https://uploads.strikinglycdn.com/files/aecbd7e8-7fb1-43bc-8d17-00fedbb3bd54/siboka.pdf
    • http://vozazalemul.epizy.com/critical_theory_today_3rd_edition.pdf
    • https://uploads.strikinglycdn.com/files/b59faa4d-a196-4739-a381-6a28357a4cab/what_company_owns_zoom_stock.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_off0000f59b.bin
8039120b0d86907d64537068adc7ef5f69f8deb4cfb0788264558c19a0c7defd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 5280 bytes
font_01_sfnt_off00010798.bin
0426663ddbe4cddd5a38cb707b4f717b25293546c7ad585ad1f86e1fe51f20e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 11136 bytes