Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6f863c95e97351…

MALICIOUS

PDF

353.0 KB Created: 2020-10-25 12:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fac7cbbf489843e2b79c724f340ef7a8 SHA-1: db02134fd312ad9b2d9a1ca710d3ef0f226471a5 SHA-256: 1b6f863c95e973515c9f538658ddda87fc3364658a0243f917576bbfad0f1cda
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 0.9724

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://cctraff.ru/123?keyword=esc+guidelines+dyslipidemia+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f8965c26fc30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5f94af1ac1485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8cc4e625cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f94c1c905b3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f94b538b07b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f8fdcfc78455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8961e1173e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f90b5bc64111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8d8227b41d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_5f942f1e590ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f88d848ec9e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f899b9758141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f925d221c9b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/4143060285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5863/0308/files/sertraline_davis_drug_guide_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c09846-1f1f-46bb-9880-857686110b48/zokuwemavepuvelukeximivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943eb069-fa78-4e06-838a-08b669a532d9/sudefus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88eaa51-f0af-45db-8172-87b614bb25de/lanikugazegavibag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d796cac0-34ff-4f75-9a84-12fc3b7e3cdd/63552868951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8634dfdc-b378-496b-95e5-234102728694/1821512842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8334/3027/files/english_short_novels_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7060/9312/files/blue_springs_marina_boat_rental.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn 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_off0004ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE3F 5628 bytes
SHA-256: 28c1c611f84ae1fe6d38f42dd9ebdd1324fd6c8f5b86ed9d74aa63e243a3f422
font_01_sfnt_off0005014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5014B 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00050cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50CAD 13888 bytes
SHA-256: f0aede219d5591e5c5406b10b50181c759ea69b5d9edceabacede4d28dbfc554
font_03_sfnt_off00053a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A4C 16148 bytes
SHA-256: 1a2b76eb92621148de57a48589384f2ed1ce1add53d2a8f9a0414c0ea737f4f8
font_04_sfnt_off00054f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F82 11388 bytes
SHA-256: 5f64aa393d0ed867661a441bcf8d59e2ecd66e4bbdcc82a62cb3fa4c60d78d50