Malicious PDF — malware analysis report

Static analysis result for SHA-256 233b1fada6937d78…

MALICIOUS

PDF

46.4 KB Created: 2020-10-15 02:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a4ec256fe4488401ad3790561ba99ee9 SHA-1: e15b5b3cd55d955be17db6cd78e3c46a0f81c14c SHA-256: 233b1fada6937d7840448b72b683388c2421e183c2521eecc18d788543d812af
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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/123?keyword=brothers+in+arms+3+hack+android+download In PDF document text
    • https://site-1039274.mozfiles.com/files/1039274/31664223355.pdfIn PDF document text
    • https://site-1043767.mozfiles.com/files/1043767/36100376755.pdfIn PDF document text
    • https://site-1039210.mozfiles.com/files/1039210/kedejinena.pdfIn PDF document text
    • https://site-1042942.mozfiles.com/files/1042942/19808881048.pdfIn PDF document text
    • https://site-1040998.mozfiles.com/files/1040998/vocabulary_for_ielts_writing_and_speaking.pdfIn PDF document text
    • https://site-1039597.mozfiles.com/files/1039597/34546751200.pdfIn PDF document text
    • https://site-1040218.mozfiles.com/files/1040218/bohning_insert_iron_instructions.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/jemozenaz.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/zuguxuferufuba_sojuwefu.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/b5c9d98c-f6ba-4591-8256-40244ca57acd/22820783640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4d6510-2e12-422e-9206-b752d710e6ba/65867521113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45fad01-4028-4f9e-8026-e4b4db9e15c2/bosuxaruzivitibakosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0cdd85-1e0f-4d6e-bc19-8e434177c947/64230119804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8300e29d-24eb-4a75-84ec-81019363a7db/sujixawuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9477/9051/files/ridel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9406/3269/files/kexixolavejutoguxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7206/1092/files/lake_park_estates_seminole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3272/6680/files/5252234989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8319/7335/files/solving_recurrence_relations_time_complexity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9849/9997/files/42379079927.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_off00007616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7616 5548 bytes
SHA-256: 256c787cb5978d5a5b35a00f91220e609d47aabed0d2ede8724df9053e0b09fd
font_01_sfnt_off000088d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 10192 bytes
SHA-256: f10634864c047486e7901b311ed71690201a050a58331c20d12eb51026c0e889