Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5b9f0934198ca1…

MALICIOUS

PDF

91.3 KB Created: 2021-05-27 21:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 47a759bf00eafc5cc34b0b19c2d05510 SHA-1: 9c3a73615bbc8492abb7c4362ff1918d45fa2d28 SHA-256: 8a5b9f0934198ca196f1df5172ac043a6448460fad063c9dc2a697272fd75b4d
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'seumenha.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a malicious workflow, potentially involving a download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=california+dmv+driving+test+sample PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412380/normal_5fcbab07a077f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fdb6241dfed2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496812/normal_5fede1323b527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_6055f033b3d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_601144611b9a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394060/normal_5ff419b1a43a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_6044dab33093f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_602df86cf3ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5fdbc12925c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_6028913c8e649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_6041b8903151e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_600030db1cb7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e57d7c1-653e-410b-a2a9-f04ea3a9f4ef/supewemajonovaparugoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a13eb22-5dff-4ab5-b2a1-5de5e4e739e8/have_it_all_lyrics_foo_fighters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97aef68e-06a8-4315-98f9-c5fe13648712/70437410656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd968ef-d522-48fd-892d-37c464ec8fd5/fafiwipita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc0eab1-a8c3-428b-acc5-b499859a17af/93056660408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b69c36-1d9b-41e4-81d7-4b0b4a734ea2/1833055037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ef0c76-4ae0-41af-b66f-73752021a62b/the_practice_of_statistics_third_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99c7c83-0409-487c-8509-c9fd762dcc51/how_to_use_gopro_hero_4_session_as_webcam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffba0f5-83e1-4fab-be16-0d4d81c8b2d4/nadelawedadixozav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cc6a15-90bb-4abd-aa68-95442f48237b/34449972277.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 3032 bytes
SHA-256: a615cb03c468551c708f1c70a713807aa9723fc3bcde50ac2dafb53a04819c53
font_01_sfnt_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 5324 bytes
SHA-256: c3dbbb0000a3a6844e9aa618990aa31609a37426ee3c717259e2663498c5f425
font_02_sfnt_off000114c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C4 2928 bytes
SHA-256: e498f68db5ebf4c689bd00e4fa33fdc27bc9e1cb07cdb5bf2b9a525e4414f6c2
font_03_sfnt_off00012144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12144 11116 bytes
SHA-256: d1cb0eea6a4c4425d2f183f4ae3ac74bddc68fba4c11599e8815819fa9cb5b15
font_04_sfnt_off00014793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14793 16072 bytes
SHA-256: 583d81de7da5acf857e0c391ef1cdb585ed7b250cecd105d58fc3723eb698869