Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffbcf9d1ea03394…

MALICIOUS

PDF

71.9 KB Created: 2021-02-24 03:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 767f214d39ffa39b3efcb8712708fd44 SHA-1: 5b5866764b3e46cb4d0cea36e9ed79ca54304df3 SHA-256: 0ffbcf9d1ea03394975c789755ec12c8e3e912bffae619fc155c657ce648a740
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The presence of an external URI pointing to a suspicious domain and the 'Callback phishing phone lure' heuristic strongly suggest an attempt to trick the user into calling a fraudulent number, likely related to financial services. No scripts were extracted, but the PDF structure itself is indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=suntrust+bank+address+and+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381090/normal_601ef5785d27c.pdfIn PDF document text
    • http://tomogorman.com/auto_weather_update_app_android6kfrg.pdfIn PDF document text
    • http://laitlabs.pro/423649912169nrqe.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/23kibij/can_my_dog_eat_frogs_legs.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/CunIhju/61869560772.pdfIn PDF document text
    • http://xedebowut.iblogger.org/el_escudo_de_la_bandera_de_costa_rica.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/dAjjgeG/70755633432.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/drsicGB/99912102205.pdfIn PDF document text
    • http://dnepr24.info/1997463485kezi8.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/guwutivupudutu/vupizi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/gurmeet_bhadana_new_video_song.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/mokobeva.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/html_formatter_source_code.pdfIn PDF document text
    • http://bidavotajowev.epizy.com/bsli_wealth_secure_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/daily_appointment_planner_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/25530418172.pdfIn PDF document text
    • http://wawuzir.epizy.com/52564849222.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/springfield_ohio_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/matrices_multiple_choice_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/4008200464.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_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 5472 bytes
SHA-256: 6ae5e05d1e49767b1622846a43e36b4db752ab0f84772a172b16ffc2c65ef007
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 10468 bytes
SHA-256: 0e7ba94d41fdbdfe00c3532ac47a6968a02aed395b12bf6eeece81df128bb5a0

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