Malicious PDF — malware analysis report

Static analysis result for SHA-256 6547e643244b74e3…

MALICIOUS

PDF

79.8 KB Created: 2021-04-08 00:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e62565614729b52926058e8ee0ffdba7 SHA-1: 54b64631d88068c3c64831f2f0be6ef9df59878b SHA-256: 6547e643244b74e3233ef077b8a4def7a307a03511d58e42b9543b9c41a90228
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. The embedded URL, while not definitively malicious, is associated with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://jottigo.ru/123?utm_term=ntsi+defensive+driving+answers PDF link annotation
    • https://cdn.sqhk.co/towinomer/eid6Phg/hit_songs_of_the_70s_and_80s.pdfIn PDF document text
    • http://bigakeka.iblogger.org/fudawugidap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377371/normal_5fdd31fbc1346.pdfIn PDF document text
    • http://kowezuzapine.66ghz.com/what_is_the_nutrition_care_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/ihb9jfl/one_line_puzzle_questions_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_600a8b6fe1396.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/ich3jiP/dufojuwexofezaxuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60219ea00e004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_5ff3b33128265.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://segelomo.epizy.com/gutizulevije.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/46938992868.pdfIn PDF document text
    • http://xofogijatoli.epizy.com/69477009621.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/dark_souls_wikidot_armor.pdfIn PDF document text
    • http://wudobew.epizy.com/61119566800.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/calories_in_a_sonic_breakfast_burrito.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/50192313304.pdfIn PDF document text
    • http://dejosabo.epizy.com/6186061642.pdfIn PDF document text
    • http://bufolezipozazom.epizy.com/que_es_politeismo.pdfIn PDF document text
    • http://guvukexapa.rf.gd/45892457102.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/vusagafufeve.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/zajozesajetosa.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/teluvofitonatexosepizo.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/how_to_write_an_assessment_for_a_lesson_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/business_card_design_template_psd_free.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_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5164 bytes
SHA-256: 3f5d78448a71d10b5d51f70634323d50f8d62a5476cad1afd71a9cf04bb9bf67
font_01_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 11448 bytes
SHA-256: d32d2ab864c1fe72b55de431d5da41fca97c421590655bc407b8ac7359504afe

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