Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f60800fc6cdaad…

MALICIOUS

PDF

52.3 KB Created: 2020-11-09 04:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 01abfdcb830c1b3a8822a2624088cb6a SHA-1: 7f1a3b8a949cbaf738a49c4161cfcfd2fb217863 SHA-256: 56f60800fc6cdaad03a38c7aa8e4bdfc94f425edf1f1dcff6da54f59721d52b2
124 Risk Score

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 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.
  • 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://traffine.ru/aws?keyword=threshold+frequency+table In PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/belibokeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420476/normal_5f9ae8a668e5a.pdfIn PDF document text
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/5b42b8.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f8f57fabc88e.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/8d47eaf94a79.pdfIn PDF document text
    • https://misikeni.weebly.com/uploads/1/3/4/3/134336029/lewukogeguke.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/e62c37dc-14d7-44f8-a603-8483759a6500/economic_migrant_push_and_pull_factors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44eb8447-77a9-4fd7-815f-863c523db767/dixabikezopifokevisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f7213b-049e-40ae-8dec-2718a3b42ac6/bamani.pdfIn PDF document text
    • https://rofaruna.files.wordpress.com/2020/11/28912194344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e18222-350c-40b6-a10d-925f1c667e0e/88504103135.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/vewujugadabumowudamuwak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d15378c-cc85-4c4a-8116-26ff6e79c9b9/49457446200.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/xabatabarodirilagixijavo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 5424 bytes
SHA-256: 1521f93d9e066b6706ebca0bd52c05c8ccda7875c6900ccc1836393520af0e7f
font_01_sfnt_off00008928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8928 11156 bytes
SHA-256: 9281a2ecc6d0c42e858e9c801610cf7fe2f5b4b8397a90737123675b23285295
font_02_sfnt_off0000af96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF96 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74

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