Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83ff7adb990dfe7…

MALICIOUS

PDF

75.9 KB Created: 2021-03-02 23:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 009578a914a94f9272422f54ae10ac0d SHA-1: 757e16a73670c5820634229c027a5155e6f49577 SHA-256: b83ff7adb990dfe7d5fc523167215c0fe78b43b49f29a906bbe030f951b6fe5f
136 Risk Score

Malware Insights

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

The PDF contains an invisible link that redirects to a suspicious domain hosting another PDF. This technique is commonly used in phishing campaigns to trick users into downloading malicious files or entering credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/strik?utm_term=what+is+a+personal+essay+for+college PDF link annotation
    • http://onlinetiser.website/6808507018606hzo.pdfIn PDF document text
    • http://meetraisins.club/car_games_playl12wg.pdfIn PDF document text
    • http://igcopyrightforhelps.com/23058880552kda99.pdfIn PDF document text
    • http://ens-pictures.ru/matedanerejefuvejalel3lpm.pdfIn PDF document text
    • http://leree6.club/72286668627qm88p.pdfIn PDF document text
    • http://christinaanddavid2019.com/arihant_sample_papers_class_12_accountancygh320.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/helter_skelter_movie_2020gjidh.pdfIn PDF document text
    • http://fartook.online/34474911804069b1.pdfIn PDF document text
    • http://upgrade4me.com/98043281096h6m7v.pdfIn PDF document text
    • http://loginwithfb.site/33368944978pmw9o.pdfIn PDF document text
    • http://avtovishki-msk.ru/the_roommate_cast_nina_dobrevptzq1.pdfIn PDF document text
    • http://urologo.store/ap_style_comma_after_month_and_dayyhndm.pdfIn PDF document text
    • http://ru-dev.xyz/mazigep8gm2s.pdfIn PDF document text
    • http://5coupon.info/37402614182kgm3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/pewarejimepen.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/65056072363.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/birches_brow_formby_lane_aughton.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/equifax_free_credit_report_request.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/friends_song_music_ringtone.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_off0000ecb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 5392 bytes
SHA-256: b8393eb2c70890ce09407fbd7fd90881db36afc6177eef3bae8dbd784d905266
font_01_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 10316 bytes
SHA-256: ee7f1f3fc53382f673f590c68ead9209405409168f83cca5d470071b71f9f249

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