Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d735d5a47bfbf7…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 12:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 77840074b7b5da9187922494d2689628 SHA-1: 51130d7a0ab83a66fdc7d57b6771ceb091bef264 SHA-256: 49d735d5a47bfbf7d9cb93811a1fc80b17c9610a2875d41a43a8d97d515527b0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to 'Android app store alternative 2019', suggesting a lure to a fake or malicious app store.

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://seumenha.ru/123?utm_term=android+app+store+alternative+2019 PDF link annotation
    • http://expressday.online/binikatakagebjqsuz.pdfIn PDF document text
    • http://orehi-siberian-force.online/mifovixumotemunojozeneo5b3j.pdfIn PDF document text
    • http://prodson.fun/dikinasunupasapesutaxs7a.pdfIn PDF document text
    • http://lyudi23.ru/108276062963oyds.pdfIn PDF document text
    • http://jushq.club/what_is_a_positive_linear_association99ngb.pdfIn PDF document text
    • http://grigolia-studio.ru/30412980190qa9j3.pdfIn PDF document text
    • http://instapodarok.site/how_long_are_sodastream_bottles_good_formw5it.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/zategafozasiru/bofiwapibatine.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/full_bhagwat_geeta_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c53036c-49b0-49ed-8d2b-f41bafc9a7a2/formulas_para_calcular_el_volumen_de_todas_las_figuras_geometricas.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/43821135416.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/ls1_cam_dyno_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e645f551-ce26-4bdd-93f0-1abc0be1d1e0/tupabifimujogizama.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/nespresso_flavors_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de7d7e9-413e-4454-9c52-e310f4196200/what_is_chicago_citation_style.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/arnold_cinema_4d_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/newafixagalize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ad7c0b-c39a-45db-8b13-8d66a83f4c83/709602684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7372ed0-3d2a-48c8-a30b-089ec2b99ba4/amor_de_mi_alma_randall_stroope_letra.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/evenflo_stratos_convertible_car_seat_installation.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_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 5484 bytes
SHA-256: 5cc0b073974de2ad5f81aa07755bc5e3ab640b58cfa9c0f1881872813d87ded3
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 10664 bytes
SHA-256: 57fad54afdcb9cc681ede7da269ad18d9eb1e651e0e021f2e3d8ad22c14932af

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