Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f25fcfe1f3e1ef…

MALICIOUS

PDF

120.0 KB Created: 2021-02-25 16:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01056060637c8006f2e156acaf29c442 SHA-1: fa634a19185b5fa9b7859f790648a6879dadf994 SHA-256: 18f25fcfe1f3e1ef3087fb260dd4f22f437db941b7a1dabf8ecb889444ba4d2d
96 Risk Score

Malware Insights

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

The PDF file contains a lure message and an embedded URL that, when visited, likely leads to a malicious resource. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://leonvi.ru/wix?keyword=sorry+we+couldn%2527t+skype+tonight+copypasta PDF link annotation
    • http://panijawukufo.iblogger.org/juxipigavinulegelot.pdfIn PDF document text
    • http://dabokopi.22web.org/copart_vehicle_condition_report.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/jO4ohj6/oneplus_icon_pack_square.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/idNhiDo/latixexujo.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/gijc3hh/lokicraft_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/Zifjbfn/90594329117.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/EkgKjic/crew_tube_socks.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
    • http://munoxefarofow.rf.gd/innova_3120e_manual.pdfIn PDF document text
    • http://powajokex.rf.gd/titajezag.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/99091328537.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/hallelujah_pentatonix_sheet_music_satb.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/kizalemigopugufolegeguri.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/unblock_youku_dns_android.pdfIn PDF document text
    • http://fusarafabar.epizy.com/1187604635.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15415 5612 bytes
SHA-256: d35b898c466381654b17158673480715579fb1079002743b2d9eeff3e95b6489
font_01_sfnt_off0001672c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1672C 3544 bytes
SHA-256: 58881b84e53b382621a0275698ff075a560a2d851d319a4af1938533362e3957
font_02_sfnt_off00017500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17500 17280 bytes
SHA-256: b47487a06cfd82ad45f3af05d31ce3e5939981135b3cd1081fe5f92162bbb4b4
font_03_sfnt_off0001aab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAB9 17120 bytes
SHA-256: 8923d074079bba60e8b5f88d891b1eacb966b6f486ad1cdd6ad4b2014a44bbca
font_04_sfnt_off0001c38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C38B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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