Malicious PDF — malware analysis report

Static analysis result for SHA-256 673b9d6b26d08635…

MALICIOUS

PDF

64.7 KB Created: 2021-02-15 06:36:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 57491fa134e798e98215ff4d83fa9a33 SHA-1: 3e7de9b0b40741f317a6976eb51660a8ed8a3348 SHA-256: 673b9d6b26d08635c652fbeecf70b0bcc02813cb2edae464635d58ddf9788e33
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains references to 'Netflix account free to use', suggesting a lure. The embedded URLs point to domains that are likely part of a phishing or scam operation.

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://seumenha.ru/wix?keyword=netflix+account+free+to+use PDF link annotation
    • https://cdn.sqhk.co/nujizeres/hcRhhig/funny_videos_2020_pinoy_kalokohan_tiktok.pdfIn PDF document text
    • http://ruzopiter.iblogger.org/epileptiform_eeg_patterns.pdfIn PDF document text
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/7963024.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/gJjgibu/college_basketball_rankings_2020_coaches_poll.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/eqHFjet/bmx_bike_race_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/hcgvjaO/tamil_mashup_mp3_songs_free_download_2019.pdfIn PDF document text
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/6498750.pdfIn PDF document text
    • http://nuzidixiwetor.22web.org/22338230577.pdfIn PDF document text
    • https://cdn.sqhk.co/vetejevibas/hbhjhih/party_city_locations_in_delaware_county_pa.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/iclhigh/zizupevutekifok.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/fY8mXih/early_90s_pop_music_hits.pdfIn PDF document text
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/wotinafa_xejegas_palajol_kanika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujojovixotik.epizy.com/horizontal_analysis_of_balance_sheet_example.pdfIn PDF document text
    • http://gudirazopusexi.epizy.com/14443970913.pdfIn PDF document text
    • http://mulumibapetemom.epizy.com/74693836920.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/consumo_do_cerato_2010_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/adobe_acrobat_pro_windows_7.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_off0000c1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A8 4912 bytes
SHA-256: fdc3d452128a6ba40c8230c36f818a5872bb598ab13b04d364dc6fb4f7253ff8
font_01_sfnt_off0000d274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD274 10400 bytes
SHA-256: 0319ab76783c342518035583828cc1ed71405c17b2055ec49cbd1862aea28ed7

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