Malicious PDF — malware analysis report

Static analysis result for SHA-256 490541d0af211456…

MALICIOUS

PDF

76.1 KB Created: 2021-03-01 21:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2bd7caeeef69236b822f033c66877c7c SHA-1: ede77dc30c5078cc340f320ade81edd7514d78b6 SHA-256: 490541d0af2114564a89fe69d4bd3648d466d13ce756ee4f9f049807526d30fb
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/wix?keyword=razon+y+proporcion+ejercicios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6022e68857620.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/jhlOigi/rerisazij.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/gge0jc9/kexazotorubivadavogigeka.pdfIn PDF document text
    • https://cdn.sqhk.co/sajunabinume/fCgggib/pixel_puzzle_collection_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5fdb915dcdf04.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzesowasu/Bhbgcid/business_plan_for_application_development.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_6007c56716690.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/GaJihWG/46782584918.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/bt4iagj/dibinoraririsefisasabilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_60265b6d7a650.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/JjdtGhh/bubble_wings_offline_bubble_shooter_games_apk.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/zebarufuridorur/25143663800.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/21777506991.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/ethical_fashion_report_2019_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/17488126467.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/kahoot_answers_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/hp_elitebook_2740p_secondary_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/10093267380.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/86328169199.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/55098229253.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_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 5132 bytes
SHA-256: 1aa829310e549f5e9088a39b59992f47af47b889e7d8cfbd75b739b4cc46de48
font_01_sfnt_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 11696 bytes
SHA-256: 781e9473a7fd00a987d910367770a34fbe599469228046f714a3f0ba5af58de6

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