Malicious PDF — malware analysis report

Static analysis result for SHA-256 f343f1a0b8f4cf59…

MALICIOUS

PDF

41.5 KB Created: 2020-11-06 13:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e29556bc96915984f12558e1717c9cae SHA-1: 1d698cfd5e51df4139d77d05fd769dbedc3d27ac SHA-256: f343f1a0b8f4cf59cbd596181f290ca7a29e93be5fce762cad14c4e1e559f904
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/123?keyword=file+extension+apk+for+pc In 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/91d798a6-2e7e-47b1-9312-8813db371ad1/68024525540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfb56cd-36fc-4a25-a47c-9117007d1fe2/dugaka.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/cheliax_pathfinder_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f94262-3a90-44df-8bfd-653aeae52876/17923540028.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/21257455537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9502/3509/files/monkey_games_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da6ee9b-49a1-4187-a33f-eedf8ce0bb4f/hr_diagram_activity_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d933ee69-9cc7-437a-82aa-567ccf0cb643/85054249744.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/does_amplitude_affect_wave_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b089d4-e0b9-450b-bc5a-a4048211923e/starbucks_receipts_for_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e0823d-9e1b-4332-96df-fda831f9196e/41853848719.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/cell_organelle_puzzle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bugetufumobumirove.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/osrs_kbd_solo_range_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/wafixowenebanerebodidara.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_off0000632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5096 bytes
SHA-256: 28b0194d908710e149c2761ba1e230024325f93d7e73b5cdfe3e68318e130764
font_01_sfnt_off00007499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7499 10772 bytes
SHA-256: ef65d9d03ad2ef6c57a80233a530171f3c9151881aac0421f58573a6d3ab8584

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