Malicious PDF — malware analysis report

Static analysis result for SHA-256 c762ed2b745840ae…

MALICIOUS

PDF

33.2 KB Created: 2020-11-06 06:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0a1e8def24cd2bb7324847e87103c03a SHA-1: 2fc12e9e4119072724c1091f4e7ddbe5fa689501 SHA-256: c762ed2b745840ae8d3ddfdb990d528651872e918bae7a331406cf4ca3873c47
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for free game currency, which aligns with the malicious link's keyword. The presence of numerous external PDF links further indicates a link farm, a common tactic for SEO poisoning and distributing malicious content.

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.
  • 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.
  • 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=hack+coin+master+for+free+pc In PDF document text
    • https://lukizodik.weebly.com/uploads/1/3/4/4/134458766/nasefajafanuvurogaz.pdfIn PDF document text
    • https://vawavujak.weebly.com/uploads/1/3/4/3/134350312/c9e8fa32769.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/dotinogag_wutaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f89aadf4d9b9.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/e4a9df6b-f348-4553-ba98-bc51d3880a9c/xerumive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe8fe32-e730-4cf4-a1be-748932e6f213/80395092241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8b772f-6f1e-4004-b7fe-e8cb607d35ab/gagunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b6eccc-8f38-4d3b-ab6e-aba0e444c279/17092315566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a10ae3-d640-4839-9f7c-b9b885f31e9a/fermi_function_semiconductor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ae8497-ea00-4255-9a34-e832e0554f17/new_super_mario_bros_2_citra_rom_dow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647c448a-9d59-4708-842b-cc47a59e1092/fiwimufojejiren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0defdd-dec5-4abe-880b-b451b6867818/bigobuvapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fade9032-e05d-4356-814d-540798dc2b6e/universal_wave_equation_worksheet.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_off000044e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E4 5156 bytes
SHA-256: 324338f81c18ccfbd4905ecf00206cea3f98f36a65f4cd1131d87b828996a28b
font_01_sfnt_off00005659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5659 9944 bytes
SHA-256: 267511808483cb1322b8b2e09411d00a1cd6dcc7eb5980b622c7a49fd448719c

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