Malicious PDF — malware analysis report

Static analysis result for SHA-256 7862af9ea7631a4a…

MALICIOUS

PDF

61.5 KB Created: 2020-10-06 19:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b4ea9984f744123f1f31c5e3e6360a98 SHA-1: 9a306e1dfff8da2af69b3f6b5bcbcc4a1d550776 SHA-256: 7862af9ea7631a4a2455f4db3e78ad16654c3f31e8a4c0e074e871b8cb9cb74a
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/strik?keyword=hypertension+in+the+young+guideline+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2 In PDF document text
    • http://dinifula.sueannecelebrant.com/uploads/1/3/0/7/130776791/8247912.pdfIn PDF document text
    • http://files.passportforpaws.org/uploads/1/3/2/7/132710776/2627066.pdfIn PDF document text
    • http://files.sustainabletourismreport.com/uploads/1/3/0/8/130874529/gunom-gamuw-nefarenupiw.pdfIn PDF document text
    • http://files.littlescholarsri.com/uploads/1/3/0/7/130776023/misuveg-zeniw.pdfIn PDF document text
    • http://files.lizykuttyrajeev.com/uploads/1/3/0/7/130740292/zodudiz.pdfIn PDF document text
    • http://zufidob.aedsa.ca/uploads/1/3/1/6/131637254/sopamim.pdfIn PDF document text
    • http://kefamus.stockbridgeseatco.co.uk/uploads/1/3/2/7/132741029/9cf561.pdfIn PDF document text
    • http://files.bonafidemealprep.com/uploads/1/3/2/6/132695602/xijor_muriwetot_sofimugagiwi_mewujizagofob.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/19309332201.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/vurevujewudaxawoj.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/jajaraxidijejebozavafesok.pdfIn PDF document text
    • http://www.opentle.orgIn 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/805b947c-7067-4037-8088-eef23e97d03b/bajifatofesuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e59da4-06e8-43b4-83d5-43aef8a66115/99184754282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e69facb-0443-4ab2-ae6e-b3b66e8d09e0/8124952937.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000094ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x94FF 14044 bytes
SHA-256: 677c29aad4f6a0a170854a77a6321343f394984117d3017c87c7a815046faf13
font_00_sfnt_off00007397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 5076 bytes
SHA-256: 7b4a22b8c5c9c17c80dc59da317b19e73e91fa20ba267801964e0f637da17165
font_01_sfnt_off000084d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 6228 bytes
SHA-256: 08ce0554153cac69faba3c2f887cfcd0c27b24fdc8b4ba4516b971ae9aa68d8c
font_03_sfnt_off0000bcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC6 12796 bytes
SHA-256: def8e2f1a50dfddc17b85559e6b90446b8125328b7074a61d5e9aaffb73b709d

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