Malicious PDF — malware analysis report

Static analysis result for SHA-256 358bb18e64b73b98…

MALICIOUS

PDF

77.8 KB Created: 2021-03-28 01:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05618453f8dfb9028c3a4d785b47feb6 SHA-1: 83727701532e37051a14481389d2c7616617ea53 SHA-256: 358bb18e64b73b98af60fbc03183d73d6a14043254b1b71f78f0f391298d4082
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 phishing attempt. The document contains numerous embedded URLs, many of which are unknown or lead to potentially malicious PDF files. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://gixipures.sportsontheweb.net/segolexixux.pdf In PDF document text
    • http://lojapidabud.mypressonline.com/how_to_operate_a_hunter_thermostat.pdfIn PDF document text
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/zudowimu.pdfIn PDF document text
    • https://texelepetorabaj.weebly.com/uploads/1/3/4/7/134738155/6f6bca4a.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/vixipamalefonigimeb.pdfIn PDF document text
    • http://gladkoe-telo.xyz/vugekitamozop031ft.pdfIn PDF document text
    • https://garituba.weebly.com/uploads/1/3/4/3/134335889/d4aab.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/seburuket.pdfIn PDF document text
    • http://secret-empire.ru/14101114972u44in.pdfIn PDF document text
    • http://help-igcopyright.xyz/scratch_ile_arduino_kodlabf08wt.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/molobowosawebc2jr6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/wb/ENAH/~3/n4t4wXRn-MA/wb?keyword=best%20drawing%20apps%20for%20windows%2010%20freePDF link annotation
    • https://s3.amazonaws.com/wetowuzuxit/97317889453.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/simon_chimbetu_samatenga_free.pdfIn PDF document text
    • http://madanekobovuge.epizy.com/38030316910.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/music_sheet_holder_for_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/kitirekumidapesos.pdfIn PDF document text
    • http://zulexesovo.epizy.com/24388377727.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/jibozagovipokexurixib.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/sle_in_pregnancy_rcog.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/alcatraz_island_history_information.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D3 5300 bytes
SHA-256: 0fea2893a86f05bfe3f26105b3e9b558dbbe7d78f4500296fbd7799a7461fb60
font_01_sfnt_off0000f7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FC 10532 bytes
SHA-256: 72b99a260f36b545d4b3f4b13c32748311458bad481b487e804bfca11eb72052
font_02_sfnt_off00011c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C12 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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