Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ccdfba98db7f27…

MALICIOUS

PDF

85.4 KB Created: 2021-03-02 06:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 99ae5df93d1a7b409ff339b1a3b1addd SHA-1: e21086daeefc44404ecdaa9e7a711caf40571eb6 SHA-256: 22ccdfba98db7f27b6071630ef43d8343c20684f95d997191cfd5d139aae435c
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'xajibur.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to building a home, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/award?keyword=how+to+start+the+process+of+building+your+own+home PDF link annotation
    • http://nowuxik.iblogger.org/zuduvebosado.pdfIn PDF document text
    • https://cdn.sqhk.co/gidowoji/ijMijhW/luzimazat.pdfIn PDF document text
    • http://magazinrf.xyz/sebenixokedikipakuluqcvf.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/bjaghjd/wajepeliberevidazi.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/cmhcibr/9288611473.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/sevetunonabiwapakowudowak.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/65443150354.pdfIn PDF document text
    • http://bezufosaga.iblogger.org/free_printable_adjectives_worksheets_for_1st_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/gihgcB6/solo_music_player_pro_mod_apk_download.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/how_full_is_your_bucket_free.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/80264555065.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://finunaji.rf.gd/rem_live_bootlegs.pdfIn PDF document text
    • http://gonuwufif.epizy.com/ftp_directory_windows.pdfIn PDF document text
    • http://sobibuxasegisun.rf.gd/guwahati_weather_report_tomorrow.pdfIn PDF document text
    • http://totaraxidob.rf.gd/2502720939.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/guia_de_entrenamiento_basico_calistenia.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_off00010420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 5744 bytes
SHA-256: 4cfb4266ed6ab8c73db3b9bfed2506704dff704acb7e9a3c73fe30e834358b90
font_01_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 10208 bytes
SHA-256: 51afabaeeb2bb19e8e27cea067895d711df6c9e316196a90c9bdc41334e89248
font_02_sfnt_off00013a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A74 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.