PDF static analysis report

Static analysis result for SHA-256 21db43fa95cbfc61…

SUSPICIOUS

PDF

83.5 KB Created: 2021-03-28 22:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 547d4164fa4755aee4f8218eb414625e SHA-1: 5348f827bf07f083a5a83ed28ae7d2984c15aec0 SHA-256: 21db43fa95cbfc61a94d6b4079bed116b7c41c988d575a16bee5c29e8828ae90
56 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as suspicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://botokaw.ru/strik?utm_term=cooking+merit+badge+pamphlet+2019+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485809/normal_6001924722422.pdfIn PDF document text
    • http://verifybadgehelp.com/baofeng_uv-5r_quick_guidefwgsx.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/administracin_financiera_contempornea_moyer_9a_ed.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/7jhc11t/27223948568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424400/normal_5fede2e0b2ead.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/jegfwia/pj_masks_hero_academia_apk_download.pdfIn PDF document text
    • http://pollsexpert.com/21271150163hhc0n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_605900fe3f9db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_602e07ee95990.pdfIn PDF document text
    • http://magnitoli-2ekran.site/bbc_news_video_online9i9xz.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/tilanulod.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/xojafemori/12033987583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93881007-8116-441c-a6bb-4011262ac024/dunkin_donuts_latte_sugar_content.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/66985789697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb764eec-acee-4be2-9cd9-6c42c9242a2c/redodozitatabenigexujuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb90712f-472f-4d7d-b58b-db60704a7d0a/ruzodoxum.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/86038590132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccedd687-e962-4957-ab71-9fe41ab2e989/which_online_spanish_courses_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/petowawufi.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_off000106cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 5868 bytes
SHA-256: 09d6040b548aa7b9862c8dc916bfb13dadf49615c20f0a11a0bc483ca64189ce
font_01_sfnt_off00011a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9A 11376 bytes
SHA-256: 22f37d972653fe099392855550847cfeb0a955a8b0f3d8795f935ad1ba5ff6fd