Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05550079a9e9f07…

MALICIOUS

PDF

68.4 KB Created: 2021-03-02 00:37:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab4271a72530a532bbe30d65118537e0 SHA-1: d85b21ff7f6f1a632637aa35aed43e0e54f6397d SHA-256: d05550079a9e9f07888872633af78ea3b23b95e0d0adb1a98bab6d40aa2a5503
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational worksheets.

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://maypoin.ru/wix?keyword=estimating+answers+to+calculations+worksheet PDF link annotation
    • http://xulubapatoso.scienceontheweb.net/vosozarefumezunop.pdfIn PDF document text
    • http://vabetovopux.66ghz.com/tosinojawuxojuziwad.pdfIn PDF document text
    • https://nakupibizotan.weebly.com/uploads/1/3/4/7/134730769/buwajemakowubizubib.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/purcell_electricity_and_magnetism_2nd_edition_solutions.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/mabujumuvarota.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/forgotten_realms_3.5_download.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/voyager_2_discoveries_wall_of_fire_at_solar_systems_edge.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/does_roomba_860_have_wifi.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/stand-up_comedian_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/cxJkUIX/merovironuzijowoxoliwur.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/LlWyjdJ/spider_man_running_games_online_free.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/estructura_general_de_la_metodologia_dela_investigacion_cientifica.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/gazovif.pdfIn PDF document text
    • https://subafoxa.weebly.com/uploads/1/3/1/3/131379179/3471913.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejufutaz.onlinewebshop.net/57620835496.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_off0000cfc4.bin
04972cf7a46d200b1766069730b8ed69ed47b337c90f99ed0d9be512ba4b65b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC4 5328 bytes
font_01_sfnt_off0000e1c9.bin
f33db89275ec006adaad914a9f4efa9f83f48c3dad75c03641616b0c91424f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 10204 bytes

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