Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db92e9c579d289e…

MALICIOUS

PDF

35.3 KB Created: 2020-10-09 20:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 77ca65dbef1b7ca463577d33411fe1cb SHA-1: 8f7336f75ba7d960274b3a7c47b39eb4cbed78f9 SHA-256: 3db92e9c579d289e58d3612720f7d5b312f6fa577a85abb65598e792c5e92c02
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick the user into downloading potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=descargar+el+diario+de+greg+5+pdf+completo+gratis In PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/javulugasodogojuwos.pdfIn PDF document text
    • https://site-1039886.mozfiles.com/files/1039886/4417326804.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/26381694500.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/wutekuvopisufi.pdfIn PDF document text
    • http://giwoneju.esmeraldastore.com/uploads/1/3/1/3/131380081/4597643.pdfIn PDF document text
    • http://zomigid.pigsandpedals.com/uploads/1/3/0/7/130776702/nifopateg_zakebelaxiv_lijuvudijiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/la_quinta_disciplina_peter_senge_conclusion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8523/6886/files/pupoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8869/7761/files/zisemidosar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7396/6758/files/19.2_volt_craftsman_battery_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/dca_vantage_operators_manual_troubleshooting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/lg_vacuum_cleaner_robot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5619/6515/files/kixifi.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_off00004834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4834 5596 bytes
SHA-256: 87739e301bccefe2a1346d64dd18869420813d01d8d6843459fa886e058411a6
font_01_sfnt_off00005b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B35 10700 bytes
SHA-256: da7e0ad67409240ea7f37123d2625136602979ea6bbe64510dd1f40dcdcacee2