Malicious PDF — malware analysis report

Static analysis result for SHA-256 286caee3e301c9dd…

MALICIOUS

PDF

121.2 KB Created: 2021-04-15 15:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1dedd5e4d9578dc0b745620633d5016b SHA-1: bec949fe74b9d125a26ab1401528a7217874b4c0 SHA-256: 286caee3e301c9dd8df1ca727dd0af65da6d95c5846e61cf79e2167887c58fa0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though partially obfuscated, suggests a lure related to a news event ('how was jaycee dugard rescued'), intended to drive users to external sites for further compromise. No scripts were extracted, but the extensive link farm and high ML score indicate a strong intent to redirect users to malicious content.

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://baarspo.ru/strik?utm_term=how+was+jaycee+dugard+rescued PDF link annotation
    • https://sefuzogesosemo.weebly.com/uploads/1/3/4/5/134579576/babapidefowagofuzed.pdfIn PDF document text
    • https://vinipuzi.weebly.com/uploads/1/3/0/7/130776781/jenifupotod.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/gkdHif6/pase_elite_de_octubre_2020_free_fire.pdfIn PDF document text
    • http://faporivifavavep.22web.org/anand_sahib_english_transliteration.pdfIn PDF document text
    • http://gebigulexejo.sportsontheweb.net/financial_risk_analysis.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/psicomagia_alejandro_jodorowsky_italiano.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/3KhcifF/subureb.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/fbf8fdacde559.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/mr._coffeer_cafe_barista_bvmc-ecmp1000_espresso_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/xF9bihG/sonic_adventure_2_soundtrack_lyrics.pdfIn PDF document text
    • https://valefeka.weebly.com/uploads/1/3/5/3/135345526/rawofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/werubepedixojov.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/xedamulatub.pdfIn PDF document text
    • http://vakogez.myartsonline.com/44999769319.pdfIn PDF document text
    • http://kesolimasakifi.myartsonline.com/5872922934.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/4978758064.pdfIn PDF document text
    • http://sazororazinub.epizy.com/14152144640.pdfIn PDF document text
    • http://kozitoxezafovi.rf.gd/2018_chevy_cruze_diesel_hatchback_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/30_day_green_smoothie_for_life.pdfIn PDF document text
    • http://tarepos.onlinewebshop.net/pufefarutesew.pdfIn PDF document text
    • http://limekukojaso.epizy.com/21963399382.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/forazejewafonozogufek.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_off00019df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DF3 5304 bytes
SHA-256: bb5854488369224570b9391d828cee63abbb98163730650a347bd80c8eca1666
font_01_sfnt_off0001b028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B028 11452 bytes
SHA-256: 27685ccdd7aef8efe93b37717b10b2ef089c8f482142d48839b96a552e725734

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