Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dee1fef3038ecb5…

MALICIOUS

PDF

74.1 KB Created: 2021-02-23 10:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f4dadcd59bf37a4ff5459a84da20f23f SHA-1: 1fd5a28596b579f2594c404f0c9225491b107736 SHA-256: 2dee1fef3038ecb5c4854ef54c1e91b4d9eddee41f8d97620165cc796865c278
184 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, likely intended to trick users into clicking malicious links. The presence of multiple disposable hosting domains and redirector links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=will+i+am+what+i+am+song+lyrics In PDF document text
    • http://affilateapp.online/lean_organisation_management_techniques_unit_2_assessment_answersc1qzr.pdfIn PDF document text
    • http://idealica-italy.site/present_perfect_affirmative_negative_and_questions_exercisescyo4y.pdfIn PDF document text
    • http://balifruit.com/95609055220njm5a.pdfIn PDF document text
    • http://vas-rem.ru/96371172284nrb01.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/atihMid/tenor_recorder_music_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/gHPhiCH/pajeg.pdfIn PDF document text
    • http://vetodegaro.22web.org/wigus.pdfIn PDF document text
    • http://nuveclovet.xyz/curso_marketing_redes_socialeslyp8x.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/djbAIj3/shark_world_hack_version_apk_download.pdfIn PDF document text
    • http://lixamewura.iblogger.org/triste_jobim_sheet_music_guitar.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/Njaijhf/swepco_power_outage_texarkana.pdfIn PDF document text
    • http://pimovanurebi.22web.org/bejojiziwagogukejudoxule.pdfIn PDF document text
    • http://magnifioco.site/palabras_por_los_sonidos_gla_gle_glibptu8.pdfIn PDF document text
    • http://visiblawty.com/63795543737zrtbh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiwuwusa.epizy.com/ribebubepunupusoxumopuve.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/winobajurojibusuzuwu.pdfIn PDF document text
    • http://wivifizurata.epizy.com/matrimonial_advertisement_format_class_12.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/auto_chess_mobile.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/fasananozidogosabasefi.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/average_salary_news_reporter_canada.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_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 5420 bytes
SHA-256: 2f4914a1119b2ee103af3a35618f7288dc3e721529ff74fe50abe3801ccb49fe
font_01_sfnt_off0000f413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 11468 bytes
SHA-256: 5de67f23d383189d5fc1ed8cc31b9c1b841ffafde3409f71910ab5944175d0d0

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