Malicious PDF — malware analysis report

Static analysis result for SHA-256 75611188f511b4d4…

MALICIOUS

PDF

80.3 KB Created: 2021-03-18 09:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9ce6488ae914360a6d2917a62a3d97b0 SHA-1: 30bd88df54fb77b26865ea9772c6dcdc16361da9 SHA-256: 75611188f511b4d4277244ba74ebd946aa5c38dce88693873a64c82dc7f7614f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Citrix netscaler 1000v datasheet'. The presence of numerous external URIs, many hosted on disposable domains and link farms, strongly suggests a phishing or credential harvesting attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/123?utm_term=citrix+netscaler+1000v+datasheet PDF link annotation
    • https://cdn.sqhk.co/sonorizeluwi/dhhjcnH/best_tiny_house_builders_uk.pdfIn PDF document text
    • http://rafewasugajeze.22web.org/menu_costing_template_uk.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/fodebafurulasi.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/bomogebedufeji.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/DfxigJB/3278155967.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/best_pimp_rappers.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/TCUie66/drum_kit_online_keyboard.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/garefotalonujewa.pdfIn PDF document text
    • http://xazoxaruxilovo.iblogger.org/animal_adaptations_worksheets_6th_grade.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/49574090184.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/Boji1ib/download_my_hospital_doctor_game_mod_apk.pdfIn PDF document text
    • https://soxotinimom.weebly.com/uploads/1/3/4/8/134883838/b5ebea.pdfIn PDF document text
    • https://xixefofitajeres.weebly.com/uploads/1/3/3/9/133999179/rotosufokeju.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/akegd4z/tofudububupopifaxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://votitagupen.epizy.com/63622990227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8cb534b-16b9-4d92-914e-ba841289b8fb/how_to_install_night_owl_wired_security_cameras.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/cpctc_worksheet_solve_for_the_variable.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/18006302479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df32dda1-b103-4316-a96c-dd5c0727e17f/19064144406.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/4466887001.pdfIn PDF document text
    • http://vuxepogi.atwebpages.com/pagokirofaguvaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/dow_jones_30_day_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/wallpaper_3d_name.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_off0000fdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFD 5256 bytes
SHA-256: 07d1342e51fbe94fb472fd324e23c7123819bbc0946f135b42bad2a7353dd0f8
font_01_sfnt_off00010fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDB 10556 bytes
SHA-256: d6d2db799b56a7f674626b62e1be16b5a87cf8d07a9d8d8f5681332795fdf8d2

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